123123100131 has 6 divisors (see below), whose sum is σ = 177844477980. Its totient is φ = 82082066748.

The previous prime is 123123100127. The next prime is 123123100159. The reversal of 123123100131 is 131001321321.

123123100131 is a `hidden beast` number, since 12 + 312 + 310 + 0 + 1 + 31 = 666.

It is not a de Polignac number, because 123123100131 - 2² = 123123100127 is a prime.

It is a super-2 number, since 2×123123100131² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123123100231) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6840172221 + ... + 6840172238.

It is an arithmetic number, because the mean of its divisors is an integer number (29640746330).

Almost surely, 2^123123100131 is an apocalyptic number.

123123100131 is a deficient number, since it is larger than the sum of its proper divisors (54721377849).

123123100131 is a wasteful number, since it uses less digits than its factorization.

123123100131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13680344465 (or 13680344462 counting only the distinct ones).

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

Adding to 123123100131 its reverse (131001321321), we get a palindrome (254124421452).

The spelling of 123123100131 in words is "one hundred twenty-three billion, one hundred twenty-three million, one hundred thousand, one hundred thirty-one".