131120123031 has 20 divisors (see below), whose sum is σ = 196197870000. Its totient is φ = 87267450816.

The previous prime is 131120122981. The next prime is 131120123093. The reversal of 131120123031 is 130321021131.

It is not a de Polignac number, because 131120123031 - 2¹¹ = 131120120983 is a prime.

It is a super-2 number, since 2×131120123031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131120122995 and 131120123013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131120123231) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1302706 + ... + 1399743.

It is an arithmetic number, because the mean of its divisors is an integer number (9809893500).

Almost surely, 2^131120123031 is an apocalyptic number.

131120123031 is a deficient number, since it is larger than the sum of its proper divisors (65077746969).

131120123031 is an equidigital number, since it uses as much as digits as its factorization.

131120123031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2703060 (or 2703051 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 131120123031 its reverse (130321021131), we get a palindrome (261441144162).

The spelling of 131120123031 in words is "one hundred thirty-one billion, one hundred twenty million, one hundred twenty-three thousand, thirty-one".