131111123231 has 16 divisors (see below), whose sum is σ = 143341954560. Its totient is φ = 118932506880.

The previous prime is 131111123167. The next prime is 131111123257. The reversal of 131111123231 is 132321111131.

It is not a de Polignac number, because 131111123231 - 2⁶ = 131111123167 is a prime.

It is a super-2 number, since 2×131111123231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131111123291) 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, 11280335 + ... + 11291951.

It is an arithmetic number, because the mean of its divisors is an integer number (8958872160).

Almost surely, 2^131111123231 is an apocalyptic number.

131111123231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

131111123231 is a deficient number, since it is larger than the sum of its proper divisors (12230831329).

131111123231 is a wasteful number, since it uses less digits than its factorization.

131111123231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13774.

The product of its digits is 108, while the sum is 20.

Adding to 131111123231 its reverse (132321111131), we get a palindrome (263432234362).

The spelling of 131111123231 in words is "one hundred thirty-one billion, one hundred eleven million, one hundred twenty-three thousand, two hundred thirty-one".