21312010122 has 16 divisors (see below), whose sum is σ = 45902791200. Its totient is φ = 6557541552.

The previous prime is 21312010103. The next prime is 21312010141. The reversal of 21312010122 is 22101021312.

It is an interprime number because it is at equal distance from previous prime (21312010103) and next prime (21312010141).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136615372 + ... + 136615527.

It is an arithmetic number, because the mean of its divisors is an integer number (2868924450).

Almost surely, 2^21312010122 is an apocalyptic number.

21312010122 is an abundant number, since it is smaller than the sum of its proper divisors (24590781078).

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

21312010122 is a wasteful number, since it uses less digits than its factorization.

21312010122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273230917.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21312010122 its reverse (22101021312), we get a palindrome (43413031434).

The spelling of 21312010122 in words is "twenty-one billion, three hundred twelve million, ten thousand, one hundred twenty-two".