123113013111 has 48 divisors (see below), whose sum is σ = 204269869440. Its totient is φ = 70664996160.

The previous prime is 123113013071. The next prime is 123113013131. The reversal of 123113013111 is 111310311321.

123113013111 is a `hidden beast` number, since 12 + 311 + 30 + 1 + 311 + 1 = 666.

It is not a de Polignac number, because 123113013111 - 2¹⁹ = 123112488823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123113013131) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7566661 + ... + 7582913.

It is an arithmetic number, because the mean of its divisors is an integer number (4255622280).

Almost surely, 2^123113013111 is an apocalyptic number.

123113013111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

123113013111 is a deficient number, since it is larger than the sum of its proper divisors (81156856329).

123113013111 is a wasteful number, since it uses less digits than its factorization.

123113013111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20316 (or 20313 counting only the distinct ones).

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

Adding to 123113013111 its reverse (111310311321), we get a palindrome (234423324432).

The spelling of 123113013111 in words is "one hundred twenty-three billion, one hundred thirteen million, thirteen thousand, one hundred eleven".