123113211013111 has 4 divisors (see below), whose sum is σ = 134305321105224. Its totient is φ = 111921100921000.

The previous prime is 123113211013103. The next prime is 123113211013147. The reversal of 123113211013111 is 111310112311321.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123113211013111 - 2³ = 123113211013103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123113211013151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5596055046040 + ... + 5596055046061.

It is an arithmetic number, because the mean of its divisors is an integer number (33576330276306).

Almost surely, 2^{123113211013111} is an apocalyptic number.

123113211013111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

123113211013111 is a deficient number, since it is larger than the sum of its proper divisors (11192110092113).

123113211013111 is a wasteful number, since it uses less digits than its factorization.

123113211013111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11192110092112.

The product of its (nonzero) digits is 108, while the sum is 22.

Adding to 123113211013111 its reverse (111310112311321), we get a palindrome (234423323324432).

The spelling of 123113211013111 in words is "one hundred twenty-three trillion, one hundred thirteen billion, two hundred eleven million, thirteen thousand, one hundred eleven".