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11213211331220 = 2254317217576187
BaseRepresentation
bin1010001100101100011101…
…1110100110101010010100
31110200222020222101112012112
42203023013132212222110
52432204124100044340
635503140030210152
72235061554455063
oct243130736465224
943628228345175
1011213211331220
113633550517868
121311241953958
1363452a838982
142aaa180b41da
15146a348c7065
hexa32c77a6a94

11213211331220 has 48 divisors (see below), whose sum is σ = 24109369720128. Its totient is φ = 4378429413120.

The previous prime is 11213211331207. The next prime is 11213211331229. The reversal of 11213211331220 is 2213311231211.

It is a happy number.

11213211331220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×112132113312202 (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11213211331229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2308034 + ... + 5268153.

It is an arithmetic number, because the mean of its divisors is an integer number (502278535836).

Almost surely, 211213211331220 is an apocalyptic number.

11213211331220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11213211331220 is an abundant number, since it is smaller than the sum of its proper divisors (12896158388908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11213211331220 is a wasteful number, since it uses less digits than its factorization.

11213211331220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7577960 (or 7577958 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 11213211331220 its reverse (2213311231211), we get a palindrome (13426522562431).

The spelling of 11213211331220 in words is "eleven trillion, two hundred thirteen billion, two hundred eleven million, three hundred thirty-one thousand, two hundred twenty".

Divisors: 1 2 4 5 10 20 43 86 172 215 430 860 1721 3442 6884 8605 17210 34420 74003 148006 296012 370015 740030 1480060 7576187 15152374 30304748 37880935 75761870 151523740 325776041 651552082 1303104164 1628880205 3257760410 6515520820 13038617827 26077235654 52154471308 65193089135 130386178270 260772356540 560660566561 1121321133122 2242642266244 2803302832805 5606605665610 11213211331220