31120023011 has 16 divisors (see below), whose sum is σ = 39847614720. Its totient is φ = 23593978080.

The previous prime is 31120022987. The next prime is 31120023019. The reversal of 31120023011 is 11032002113.

It is a cyclic number.

It is not a de Polignac number, because 31120023011 - 2²² = 31115828707 is a prime.

It is a super-2 number, since 2×31120023011² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31120023019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5458721 + ... + 5464418.

It is an arithmetic number, because the mean of its divisors is an integer number (2490475920).

Almost surely, 2^31120023011 is an apocalyptic number.

31120023011 is a deficient number, since it is larger than the sum of its proper divisors (8727591709).

31120023011 is a wasteful number, since it uses less digits than its factorization.

31120023011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10923194.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 31120023011 its reverse (11032002113), we get a palindrome (42152025124).

The spelling of 31120023011 in words is "thirty-one billion, one hundred twenty million, twenty-three thousand, eleven".