123130111311 has 28 divisors (see below), whose sum is σ = 186835032888. Its totient is φ = 81097704144.

The previous prime is 123130111309. The next prime is 123130111373. The reversal of 123130111311 is 113111031321.

123130111311 is a `hidden beast` number, since 1 + 231 + 301 + 1 + 131 + 1 = 666.

It is not a de Polignac number, because 123130111311 - 2¹ = 123130111309 is a prime.

It is a super-2 number, since 2×123130111311² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123130111381) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 956980 + ... + 1077993.

It is an arithmetic number, because the mean of its divisors is an integer number (6672679746).

Almost surely, 2^123130111311 is an apocalyptic number.

123130111311 is a deficient number, since it is larger than the sum of its proper divisors (63704921577).

123130111311 is an frugal number, since it uses more digits than its factorization.

123130111311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2035074 (or 2035059 counting only the distinct ones).

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

Adding to 123130111311 its reverse (113111031321), we get a palindrome (236241142632).

The spelling of 123130111311 in words is "one hundred twenty-three billion, one hundred thirty million, one hundred eleven thousand, three hundred eleven".