123120320101989 has 16 divisors (see below), whose sum is σ = 187677082091520. Its totient is φ = 70330031475120.

The previous prime is 123120320101981. The next prime is 123120320102009. The reversal of 123120320101989 is 989101023021321.

It is not a de Polignac number, because 123120320101989 - 2³ = 123120320101981 is a prime.

It is a super-2 number, since 2×123120320101989² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123120320101989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123120320101981) 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 15 ways as a sum of consecutive naturals, for example, 1018152877 + ... + 1018273794.

It is an arithmetic number, because the mean of its divisors is an integer number (11729817630720).

Almost surely, 2^{123120320101989} is an apocalyptic number.

It is an amenable number.

123120320101989 is a deficient number, since it is larger than the sum of its proper divisors (64556761989531).

123120320101989 is a wasteful number, since it uses less digits than its factorization.

123120320101989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2036429560.

The product of its (nonzero) digits is 46656, while the sum is 42.

The spelling of 123120320101989 in words is "one hundred twenty-three trillion, one hundred twenty billion, three hundred twenty million, one hundred one thousand, nine hundred eighty-nine".