123110213031 has 36 divisors (see below), whose sum is σ = 192634767000. Its totient is φ = 75729536064.

The previous prime is 123110213027. The next prime is 123110213041. The reversal of 123110213031 is 130312011321.

It is not a de Polignac number, because 123110213031 - 2² = 123110213027 is a prime.

It is a super-2 number, since 2×123110213031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123110212995 and 123110213013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123110213021) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4090185 + ... + 4120173.

It is an arithmetic number, because the mean of its divisors is an integer number (5350965750).

Almost surely, 2^123110213031 is an apocalyptic number.

123110213031 is a deficient number, since it is larger than the sum of its proper divisors (69524553969).

123110213031 is a wasteful number, since it uses less digits than its factorization.

123110213031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32720 (or 32704 counting only the distinct ones).

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

Adding to 123110213031 its reverse (130312011321), we get a palindrome (253422224352).

The spelling of 123110213031 in words is "one hundred twenty-three billion, one hundred ten million, two hundred thirteen thousand, thirty-one".