123100012031031 has 20 divisors (see below), whose sum is σ = 210160161634192. Its totient is φ = 70342864017408.

The previous prime is 123100012031021. The next prime is 123100012031149. The reversal of 123100012031031 is 130130210001321.

123100012031031 is a `hidden beast` number, since 1 + 2 + 310 + 0 + 0 + 12 + 0 + 310 + 31 = 666.

It is not a de Polignac number, because 123100012031031 - 2⁹ = 123100012030519 is a prime.

It is a super-2 number, since 2×123100012031031² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123100012030995 and 123100012031013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123100012031021) 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, 108553801930 + ... + 108553803063.

Almost surely, 2^{123100012031031} is an apocalyptic number.

123100012031031 is a deficient number, since it is larger than the sum of its proper divisors (87060149603161).

123100012031031 is an equidigital number, since it uses as much as digits as its factorization.

123100012031031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217107605012 (or 217107605003 counting only the distinct ones).

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

Adding to 123100012031031 its reverse (130130210001321), we get a palindrome (253230222032352).

The spelling of 123100012031031 in words is "one hundred twenty-three trillion, one hundred billion, twelve million, thirty-one thousand, thirty-one".