120021383605 has 4 divisors (see below), whose sum is σ = 144025660332. Its totient is φ = 96017106880.

The previous prime is 120021383597. The next prime is 120021383611. The reversal of 120021383605 is 506383120021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 506383120021 = 19 ⋅26651743159.

It can be written as a sum of positive squares in 2 ways, for example, as 19360496164 + 100660887441 = 139142^2 + 317271^2 .

It is not a de Polignac number, because 120021383605 - 2³ = 120021383597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12002138356 + ... + 12002138365.

It is an arithmetic number, because the mean of its divisors is an integer number (36006415083).

Almost surely, 2^120021383605 is an apocalyptic number.

It is an amenable number.

120021383605 is a deficient number, since it is larger than the sum of its proper divisors (24004276727).

120021383605 is an equidigital number, since it uses as much as digits as its factorization.

120021383605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24004276726.

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 120021383605 in words is "one hundred twenty billion, twenty-one million, three hundred eighty-three thousand, six hundred five".