13012131312 has 30 divisors (see below), whose sum is σ = 36415895672. Its totient is φ = 4337377056.

The previous prime is 13012131311. The next prime is 13012131371. The reversal of 13012131312 is 21313121031.

13012131312 is a `hidden beast` number, since 1 + 301 + 21 + 31 + 312 = 666.

It is a super-2 number, since 2×13012131312² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13012131311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45180868 + ... + 45181155.

Almost surely, 2^13012131312 is an apocalyptic number.

13012131312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13012131312 is an abundant number, since it is smaller than the sum of its proper divisors (23403764360).

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

13012131312 is a wasteful number, since it uses less digits than its factorization.

13012131312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90362037 (or 90362028 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 13012131312 its reverse (21313121031), we get a palindrome (34325252343).

The spelling of 13012131312 in words is "thirteen billion, twelve million, one hundred thirty-one thousand, three hundred twelve".