13103121312 has 72 divisors (see below), whose sum is σ = 37965102084. Its totient is φ = 4285292544.

The previous prime is 13103121307. The next prime is 13103121391. The reversal of 13103121312 is 21312130131.

It can be written as a sum of positive squares in 2 ways, for example, as 12275753616 + 827367696 = 110796^2 + 28764^2 .

It is a tau number, because it is divible by the number of its divisors (72).

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 413953 + ... + 444480.

Almost surely, 2^13103121312 is an apocalyptic number.

13103121312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13103121312 is an abundant number, since it is smaller than the sum of its proper divisors (24861980772).

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

13103121312 is a wasteful number, since it uses less digits than its factorization.

13103121312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858502 (or 858491 counting only the distinct ones).

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

Adding to 13103121312 its reverse (21312130131), we get a palindrome (34415251443).

The spelling of 13103121312 in words is "thirteen billion, one hundred three million, one hundred twenty-one thousand, three hundred twelve".