1312133130021 has 16 divisors (see below), whose sum is σ = 1999457011328. Its totient is φ = 749784340800.

The previous prime is 1312133130017. The next prime is 1312133130031. The reversal of 1312133130021 is 1200313312131.

It is a happy number.

It is not a de Polignac number, because 1312133130021 - 2² = 1312133130017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 1312133130021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312133130031) 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, 4701531 + ... + 4972791.

It is an arithmetic number, because the mean of its divisors is an integer number (124966063208).

Almost surely, 2^{1312133130021} is an apocalyptic number.

It is an amenable number.

1312133130021 is a deficient number, since it is larger than the sum of its proper divisors (687323881307).

1312133130021 is a wasteful number, since it uses less digits than its factorization.

1312133130021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501612.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 1312133130021 its reverse (1200313312131), we get a palindrome (2512446442152).

The spelling of 1312133130021 in words is "one trillion, three hundred twelve billion, one hundred thirty-three million, one hundred thirty thousand, twenty-one".