31231131113 has 16 divisors (see below), whose sum is σ = 38474392320. Its totient is φ = 24687153216.

The previous prime is 31231131101. The next prime is 31231131121. The reversal of 31231131113 is 31113113213.

It is a cyclic number.

It is not a de Polignac number, because 31231131113 - 2¹⁴ = 31231114729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31231131013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63245 + ... + 257802.

It is an arithmetic number, because the mean of its divisors is an integer number (2404649520).

Almost surely, 2^31231131113 is an apocalyptic number.

It is an amenable number.

31231131113 is a deficient number, since it is larger than the sum of its proper divisors (7243261207).

31231131113 is a wasteful number, since it uses less digits than its factorization.

31231131113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322136.

The product of its digits is 162, while the sum is 20.

Adding to 31231131113 its reverse (31113113213), we get a palindrome (62344244326).

The spelling of 31231131113 in words is "thirty-one billion, two hundred thirty-one million, one hundred thirty-one thousand, one hundred thirteen".