31020020231311 has 2 divisors, whose sum is σ = 31020020231312. Its totient is φ = 31020020231310.

The previous prime is 31020020231297. The next prime is 31020020231353. The reversal of 31020020231311 is 11313202002013.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31020020231311 - 2⁷ = 31020020231183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31020020231381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15510010115655 + 15510010115656.

It is an arithmetic number, because the mean of its divisors is an integer number (15510010115656).

Almost surely, 2^{31020020231311} is an apocalyptic number.

31020020231311 is a deficient number, since it is larger than the sum of its proper divisors (1).

31020020231311 is an equidigital number, since it uses as much as digits as its factorization.

31020020231311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31020020231311 its reverse (11313202002013), we get a palindrome (42333222233324).

The spelling of 31020020231311 in words is "thirty-one trillion, twenty billion, twenty million, two hundred thirty-one thousand, three hundred eleven".