13120311031312 has 20 divisors (see below), whose sum is σ = 25479310725820. Its totient is φ = 6545005037568.

The previous prime is 13120311031291. The next prime is 13120311031313. The reversal of 13120311031312 is 21313011302131.

It can be written as a sum of positive squares in 2 ways, for example, as 4857192841216 + 8263118190096 = 2203904^2 + 2874564^2 .

It is not an unprimeable number, because it can be changed into a prime (13120311031313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 946897737 + ... + 946911592.

It is an arithmetic number, because the mean of its divisors is an integer number (1273965536291).

Almost surely, 2^{13120311031312} is an apocalyptic number.

It is an amenable number.

13120311031312 is a deficient number, since it is larger than the sum of its proper divisors (12358999694508).

13120311031312 is a wasteful number, since it uses less digits than its factorization.

13120311031312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1893809770 (or 1893809764 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 13120311031312 its reverse (21313011302131), we get a palindrome (34433322333443).

The spelling of 13120311031312 in words is "thirteen trillion, one hundred twenty billion, three hundred eleven million, thirty-one thousand, three hundred twelve".