12311031111 has 16 divisors (see below), whose sum is σ = 16665011328. Its totient is φ = 8082280800.

The previous prime is 12311031067. The next prime is 12311031113. The reversal of 12311031111 is 11113011321.

It is not a de Polignac number, because 12311031111 - 2¹⁷ = 12310900039 is a prime.

It is a super-2 number, since 2×12311031111² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12311031113) 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, 782341 + ... + 797921.

It is an arithmetic number, because the mean of its divisors is an integer number (1041563208).

Almost surely, 2^12311031111 is an apocalyptic number.

12311031111 is a deficient number, since it is larger than the sum of its proper divisors (4353980217).

12311031111 is a wasteful number, since it uses less digits than its factorization.

12311031111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19582.

The product of its (nonzero) digits is 18, while the sum is 15.

Adding to 12311031111 its reverse (11113011321), we get a palindrome (23424042432).

The spelling of 12311031111 in words is "twelve billion, three hundred eleven million, thirty-one thousand, one hundred eleven".