31331013011 has 24 divisors (see below), whose sum is σ = 34041552480. Its totient is φ = 28747034624.

The previous prime is 31331012981. The next prime is 31331013013. The reversal of 31331013011 is 11031013313.

It is a de Polignac number, because none of the positive numbers 2^k-31331013011 is a prime.

It is a super-2 number, since 2×31331013011² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31331013013) 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 23 ways as a sum of consecutive naturals, for example, 69779315 + ... + 69779763.

It is an arithmetic number, because the mean of its divisors is an integer number (1418398020).

Almost surely, 2^31331013011 is an apocalyptic number.

31331013011 is a deficient number, since it is larger than the sum of its proper divisors (2710539469).

31331013011 is an equidigital number, since it uses as much as digits as its factorization.

31331013011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183 (or 734 counting only the distinct ones).

The product of its (nonzero) digits is 81, while the sum is 17.

Adding to 31331013011 its reverse (11031013313), we get a palindrome (42362026324).

The spelling of 31331013011 in words is "thirty-one billion, three hundred thirty-one million, thirteen thousand, eleven".