123020113131 has 24 divisors (see below), whose sum is σ = 188880563664. Its totient is φ = 76888719360.

The previous prime is 123020113127. The next prime is 123020113159. The reversal of 123020113131 is 131311020321.

It is not a de Polignac number, because 123020113131 - 2² = 123020113127 is a prime.

It is a super-2 number, since 2×123020113131² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123020113121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1524985 + ... + 1603626.

It is an arithmetic number, because the mean of its divisors is an integer number (7870023486).

Almost surely, 2^123020113131 is an apocalyptic number.

123020113131 is a deficient number, since it is larger than the sum of its proper divisors (65860450533).

123020113131 is a wasteful number, since it uses less digits than its factorization.

123020113131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3128891 (or 3128888 counting only the distinct ones).

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

Adding to 123020113131 its reverse (131311020321), we get a palindrome (254331133452).

The spelling of 123020113131 in words is "one hundred twenty-three billion, twenty million, one hundred thirteen thousand, one hundred thirty-one".