123012320020109 has 32 divisors (see below), whose sum is σ = 133272916560000. Its totient is φ = 112868159339520.

The previous prime is 123012320020033. The next prime is 123012320020171. The reversal of 123012320020109 is 901020023210321.

It is not a de Polignac number, because 123012320020109 - 2¹² = 123012320016013 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123012320026109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2556288569 + ... + 2556336689.

It is an arithmetic number, because the mean of its divisors is an integer number (4164778642500).

Almost surely, 2^{123012320020109} is an apocalyptic number.

It is an amenable number.

123012320020109 is a deficient number, since it is larger than the sum of its proper divisors (10260596539891).

123012320020109 is a wasteful number, since it uses less digits than its factorization.

123012320020109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50205.

The product of its (nonzero) digits is 1296, while the sum is 26.

The spelling of 123012320020109 in words is "one hundred twenty-three trillion, twelve billion, three hundred twenty million, twenty thousand, one hundred nine".