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21222201243020 = 22547145115559483
BaseRepresentation
bin1001101001101001011011…
…10001000011010110001100
32210010211012200201121122012
410310310231301003112030
510240201032004234040
6113045202240240352
74320152634125651
oct464645561032614
983124180647565
1021222201243020
116842315381658
1224690083100b8
13bac32532171b
1453523514dc28
1526c088ba2865
hex134d2dc4358c

21222201243020 has 48 divisors (see below), whose sum is σ = 45546219468288. Its totient is φ = 8302539595200.

The previous prime is 21222201242999. The next prime is 21222201243029. The reversal of 21222201243020 is 2034210222212.

It is not an unprimeable number, because it can be changed into a prime (21222201243029) 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, 6415802 + ... + 9143681.

It is an arithmetic number, because the mean of its divisors is an integer number (948879572256).

Almost surely, 221222201243020 is an apocalyptic number.

21222201243020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21222201243020 is an abundant number, since it is smaller than the sum of its proper divisors (24324018225268).

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

21222201243020 is a wasteful number, since it uses less digits than its factorization.

21222201243020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15560990 (or 15560988 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 21222201243020 its reverse (2034210222212), we get a palindrome (23256411465232).

The spelling of 21222201243020 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred one million, two hundred forty-three thousand, twenty".

Divisors: 1 2 4 5 10 20 47 94 188 235 470 940 1451 2902 5804 7255 14510 29020 68197 136394 272788 340985 681970 1363940 15559483 31118966 62237932 77797415 155594830 311189660 731295701 1462591402 2925182804 3656478505 7312957010 14625914020 22576809833 45153619666 90307239332 112884049165 225768098330 451536196660 1061110062151 2122220124302 4244440248604 5305550310755 10611100621510 21222201243020