123110131131 has 96 divisors (see below), whose sum is σ = 204935133312. Its totient is φ = 70636769280.

The previous prime is 123110131129. The next prime is 123110131147. The reversal of 123110131131 is 131131011321.

123110131131 is a `hidden beast` number, since 12 + 311 + 0 + 1 + 311 + 31 = 666.

It is not a de Polignac number, because 123110131131 - 2¹ = 123110131129 is a prime.

It is a super-2 number, since 2×123110131131² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123110133131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 18545745 + ... + 18552381.

It is an arithmetic number, because the mean of its divisors is an integer number (2134740972).

Almost surely, 2^123110131131 is an apocalyptic number.

123110131131 is a deficient number, since it is larger than the sum of its proper divisors (81825002181).

123110131131 is a wasteful number, since it uses less digits than its factorization.

123110131131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6853 (or 6850 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

Adding to 123110131131 its reverse (131131011321), we get a palindrome (254241142452).

The spelling of 123110131131 in words is "one hundred twenty-three billion, one hundred ten million, one hundred thirty-one thousand, one hundred thirty-one".