1312314020021 has 2 divisors, whose sum is σ = 1312314020022. Its totient is φ = 1312314020020.

The previous prime is 1312314019981. The next prime is 1312314020113. The reversal of 1312314020021 is 1200204132131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1063138339396 + 249175680625 = 1031086^2 + 499175^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312314020021 - 2³⁰ = 1311240278197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1312314019975 and 1312314020002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312314070021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656157010010 + 656157010011.

It is an arithmetic number, because the mean of its divisors is an integer number (656157010011).

Almost surely, 2^{1312314020021} is an apocalyptic number.

It is an amenable number.

1312314020021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312314020021 is an equidigital number, since it uses as much as digits as its factorization.

1312314020021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1312314020021 its reverse (1200204132131), we get a palindrome (2512518152152).

The spelling of 1312314020021 in words is "one trillion, three hundred twelve billion, three hundred fourteen million, twenty thousand, twenty-one".