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11012212121 = 109247340853
BaseRepresentation
bin10100100000110000…
…10000010110011001
31001102110102100010012
422100120100112121
5140023111241441
65020421531305
7536615154461
oct122030202631
931373370105
1011012212121
114741119a59
122173b73b35
131066612061
1476676cba1
15446ba29eb
hex290610599

11012212121 has 8 divisors (see below), whose sum is σ = 11118007560. Its totient is φ = 10906503552.

The previous prime is 11012212097. The next prime is 11012212139. The reversal of 11012212121 is 12121221011.

It can be written as a sum of positive squares in 4 ways, for example, as 7597562896 + 3414649225 = 87164^2 + 58435^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11012212121 - 210 = 11012211097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11012212096 and 11012212105.

It is not an unprimeable number, because it can be changed into a prime (11012212171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 249131 + ... + 289983.

It is an arithmetic number, because the mean of its divisors is an integer number (1389750945).

Almost surely, 211012212121 is an apocalyptic number.

It is an amenable number.

11012212121 is a deficient number, since it is larger than the sum of its proper divisors (105795439).

11012212121 is a wasteful number, since it uses less digits than its factorization.

11012212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43435.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11012212121 its reverse (12121221011), we get a palindrome (23133433132).

The spelling of 11012212121 in words is "eleven billion, twelve million, two hundred twelve thousand, one hundred twenty-one".

Divisors: 1 109 2473 40853 269557 4452977 101029469 11012212121