1231112020013 has 2 divisors, whose sum is σ = 1231112020014. Its totient is φ = 1231112020012.

The previous prime is 1231112020007. The next prime is 1231112020027. The reversal of 1231112020013 is 3100202111321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1164711491524 + 66400528489 = 1079218^2 + 257683^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231112020013 - 2⁴ = 1231112019997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1231112019973 and 1231112020000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231112920013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615556010006 + 615556010007.

It is an arithmetic number, because the mean of its divisors is an integer number (615556010007).

Almost surely, 2^{1231112020013} is an apocalyptic number.

It is an amenable number.

1231112020013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231112020013 is an equidigital number, since it uses as much as digits as its factorization.

1231112020013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1231112020013 its reverse (3100202111321), we get a palindrome (4331314131334).

The spelling of 1231112020013 in words is "one trillion, two hundred thirty-one billion, one hundred twelve million, twenty thousand, thirteen".