123112313101 has 4 divisors (see below), whose sum is σ = 125130547804. Its totient is φ = 121094078400.

The previous prime is 123112313089. The next prime is 123112313117. The reversal of 123112313101 is 101313211321.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6264564201 + 116847748900 = 79149^2 + 341830^2 .

It is a cyclic number.

It is not a de Polignac number, because 123112313101 - 2³⁵ = 88752574733 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 (123112313201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1009117260 + ... + 1009117381.

It is an arithmetic number, because the mean of its divisors is an integer number (31282636951).

Almost surely, 2^123112313101 is an apocalyptic number.

It is an amenable number.

123112313101 is a deficient number, since it is larger than the sum of its proper divisors (2018234703).

123112313101 is an equidigital number, since it uses as much as digits as its factorization.

123112313101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2018234702.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 123112313101 its reverse (101313211321), we get a palindrome (224425524422).

The spelling of 123112313101 in words is "one hundred twenty-three billion, one hundred twelve million, three hundred thirteen thousand, one hundred one".