13121030312 has 16 divisors (see below), whose sum is σ = 26494388340. Its totient is φ = 6055860096.

The previous prime is 13121030303. The next prime is 13121030327. The reversal of 13121030312 is 21303012131.

It can be written as a sum of positive squares in 2 ways, for example, as 12650400676 + 470629636 = 112474^2 + 21694^2 .

It is a super-2 number, since 2×13121030312² (a number of 21 digits) contains 22 as substring.

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, 63081773 + ... + 63081980.

Almost surely, 2^13121030312 is an apocalyptic number.

It is an amenable number.

13121030312 is an abundant number, since it is smaller than the sum of its proper divisors (13373358028).

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

13121030312 is a wasteful number, since it uses less digits than its factorization.

13121030312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126163772 (or 126163768 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 13121030312 its reverse (21303012131), we get a palindrome (34424042443).

The spelling of 13121030312 in words is "thirteen billion, one hundred twenty-one million, thirty thousand, three hundred twelve".