21120211010212 has 12 divisors (see below), whose sum is σ = 37466675696716. Its totient is φ = 10415446525440.

The previous prime is 21120211010209. The next prime is 21120211010221. The reversal of 21120211010212 is 21201011202112.

It can be written as a sum of positive squares in 2 ways, for example, as 14357839602276 + 6762371407936 = 3789174^2 + 2600456^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36164744589 + ... + 36164745172.

Almost surely, 2^{21120211010212} is an apocalyptic number.

It is an amenable number.

21120211010212 is a deficient number, since it is larger than the sum of its proper divisors (16346464686504).

21120211010212 is a wasteful number, since it uses less digits than its factorization.

21120211010212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72329489838 (or 72329489836 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21120211010212 its reverse (21201011202112), we get a palindrome (42321222212324).

The spelling of 21120211010212 in words is "twenty-one trillion, one hundred twenty billion, two hundred eleven million, ten thousand, two hundred twelve".