123100020111 has 16 divisors (see below), whose sum is σ = 166614796800. Its totient is φ = 80826427968.

The previous prime is 123100020097. The next prime is 123100020133. The reversal of 123100020111 is 111020001321.

It is not a de Polignac number, because 123100020111 - 2⁵ = 123100020079 is a prime.

It is a super-2 number, since 2×123100020111² (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 (123100020161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1053835 + ... + 1164803.

It is an arithmetic number, because the mean of its divisors is an integer number (10413424800).

Almost surely, 2^123100020111 is an apocalyptic number.

123100020111 is a deficient number, since it is larger than the sum of its proper divisors (43514776689).

123100020111 is a wasteful number, since it uses less digits than its factorization.

123100020111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116558.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 123100020111 its reverse (111020001321), we get a palindrome (234120021432).

The spelling of 123100020111 in words is "one hundred twenty-three billion, one hundred million, twenty thousand, one hundred eleven".