12131131110 has 64 divisors (see below), whose sum is σ = 34347331584. Its totient is φ = 2683382400.

The previous prime is 12131131097. The next prime is 12131131121. The reversal of 12131131110 is 1113113121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 12131131110.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 925221 + ... + 938240.

It is an arithmetic number, because the mean of its divisors is an integer number (536677056).

Almost surely, 2^12131131110 is an apocalyptic number.

12131131110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12131131110 is an abundant number, since it is smaller than the sum of its proper divisors (22216200474).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12131131110 is a wasteful number, since it uses less digits than its factorization.

12131131110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1863509.

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

Adding to 12131131110 its reverse (1113113121), we get a palindrome (13244244231).

The spelling of 12131131110 in words is "twelve billion, one hundred thirty-one million, one hundred thirty-one thousand, one hundred ten".