21120211220232 has 64 divisors (see below), whose sum is σ = 55907973230400. Its totient is φ = 6625767075840.

The previous prime is 21120211220231. The next prime is 21120211220239. The reversal of 21120211220232 is 23202211202112.

It is a super-2 number, since 2×21120211220232² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21120211220199 and 21120211220208.

It is not an unprimeable number, because it can be changed into a prime (21120211220231) 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, 14605107 + ... + 15985917.

It is an arithmetic number, because the mean of its divisors is an integer number (873562081725).

Almost surely, 2^{21120211220232} is an apocalyptic number.

It is an amenable number.

21120211220232 is an abundant number, since it is smaller than the sum of its proper divisors (34787762010168).

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

21120211220232 is a wasteful number, since it uses less digits than its factorization.

21120211220232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1418326 (or 1418322 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 21120211220232 its reverse (23202211202112), we get a palindrome (44322422422344).

The spelling of 21120211220232 in words is "twenty-one trillion, one hundred twenty billion, two hundred eleven million, two hundred twenty thousand, two hundred thirty-two".