31231122021113 has 16 divisors (see below), whose sum is σ = 36690021452160. Its totient is φ = 26022838761216.

The previous prime is 31231122021097. The next prime is 31231122021131. The reversal of 31231122021113 is 31112022113213.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 31231122021113 - 2⁴ = 31231122021097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31231122021133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53397248 + ... + 53978961.

It is an arithmetic number, because the mean of its divisors is an integer number (2293126340760).

Almost surely, 2^{31231122021113} is an apocalyptic number.

It is an amenable number.

31231122021113 is a deficient number, since it is larger than the sum of its proper divisors (5458899431047).

31231122021113 is a wasteful number, since it uses less digits than its factorization.

31231122021113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107377376.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 31231122021113 its reverse (31112022113213), we get a palindrome (62343144134326).

The spelling of 31231122021113 in words is "thirty-one trillion, two hundred thirty-one billion, one hundred twenty-two million, twenty-one thousand, one hundred thirteen".