231231132202013 has 2 divisors, whose sum is σ = 231231132202014. Its totient is φ = 231231132202012.

The previous prime is 231231132201991. The next prime is 231231132202027. The reversal of 231231132202013 is 310202231132132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 231160004378809 + 71127823204 = 15203947^2 + 266698^2 .

It is a cyclic number.

It is not a de Polignac number, because 231231132202013 - 2⁸ = 231231132201757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231231132202043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115615566101006 + 115615566101007.

It is an arithmetic number, because the mean of its divisors is an integer number (115615566101007).

Almost surely, 2^{231231132202013} is an apocalyptic number.

It is an amenable number.

231231132202013 is a deficient number, since it is larger than the sum of its proper divisors (1).

231231132202013 is an equidigital number, since it uses as much as digits as its factorization.

231231132202013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 231231132202013 its reverse (310202231132132), we get a palindrome (541433363334145).

The spelling of 231231132202013 in words is "two hundred thirty-one trillion, two hundred thirty-one billion, one hundred thirty-two million, two hundred two thousand, thirteen".