1312013040123 has 16 divisors (see below), whose sum is σ = 1756908354816. Its totient is φ = 870901389600.

The previous prime is 1312013040097. The next prime is 1312013040139. The reversal of 1312013040123 is 3210403102131.

It is not a de Polignac number, because 1312013040123 - 2⁶ = 1312013040059 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1312013040123.

It is not an unprimeable number, because it can be changed into a prime (1312013040323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 479098 + ... + 1689248.

It is an arithmetic number, because the mean of its divisors is an integer number (109806772176).

Almost surely, 2^{1312013040123} is an apocalyptic number.

1312013040123 is a deficient number, since it is larger than the sum of its proper divisors (444895314693).

1312013040123 is a wasteful number, since it uses less digits than its factorization.

1312013040123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1211714.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1312013040123 its reverse (3210403102131), we get a palindrome (4522416142254).

The spelling of 1312013040123 in words is "one trillion, three hundred twelve billion, thirteen million, forty thousand, one hundred twenty-three".