120123934921 has 3 divisors (see below), whose sum is σ = 120124281511. Its totient is φ = 120123588332.

The previous prime is 120123934913. The next prime is 120123934939. The reversal of 120123934921 is 129439321021.

The square root of 120123934921 is 346589.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 49101684921 + 71022250000 = 221589^2 + 266500^2 .

It is not a de Polignac number, because 120123934921 - 2³ = 120123934913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120123934961) 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 2 ways as a sum of consecutive naturals, for example, 173295 + ... + 519883.

Almost surely, 2^120123934921 is an apocalyptic number.

120123934921 is the 346589-th square number.

120123934921 is the 173295-th centered octagonal number.

It is an amenable number.

120123934921 is a deficient number, since it is larger than the sum of its proper divisors (346590).

120123934921 is an frugal number, since it uses more digits than its factorization.

120123934921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693178 (or 346589 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The spelling of 120123934921 in words is "one hundred twenty billion, one hundred twenty-three million, nine hundred thirty-four thousand, nine hundred twenty-one".