1312013410021 has 6 divisors (see below), whose sum is σ = 1393730508530. Its totient is φ = 1234836150336.

The previous prime is 1312013410009. The next prime is 1312013410031. The reversal of 1312013410021 is 1200143102131.

It can be written as a sum of positive squares in 3 ways, for example, as 136120413025 + 1175892996996 = 368945^2 + 1084386^2 .

It is not a de Polignac number, because 1312013410021 - 2²¹ = 1312011312869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312013410031) 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, 2269919106 + ... + 2269919683.

Almost surely, 2^{1312013410021} is an apocalyptic number.

It is an amenable number.

1312013410021 is a deficient number, since it is larger than the sum of its proper divisors (81717098509).

1312013410021 is an equidigital number, since it uses as much as digits as its factorization.

1312013410021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4539838823 (or 4539838806 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1312013410021 its reverse (1200143102131), we get a palindrome (2512156512152).

The spelling of 1312013410021 in words is "one trillion, three hundred twelve billion, thirteen million, four hundred ten thousand, twenty-one".