120556820705 has 4 divisors (see below), whose sum is σ = 144668184852. Its totient is φ = 96445456560.

The previous prime is 120556820653. The next prime is 120556820887. The reversal of 120556820705 is 507028655021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 507028655021 = 7 ⋅72432665003.

It can be written as a sum of positive squares in 2 ways, for example, as 69522396241 + 51034424464 = 263671^2 + 225908^2 .

It is not a de Polignac number, because 120556820705 - 2¹⁶ = 120556755169 is a prime.

It is a Duffinian 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, 12055682066 + ... + 12055682075.

It is an arithmetic number, because the mean of its divisors is an integer number (36167046213).

Almost surely, 2^120556820705 is an apocalyptic number.

It is an amenable number.

120556820705 is a deficient number, since it is larger than the sum of its proper divisors (24111364147).

120556820705 is an equidigital number, since it uses as much as digits as its factorization.

120556820705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24111364146.

The product of its (nonzero) digits is 168000, while the sum is 41.

The spelling of 120556820705 in words is "one hundred twenty billion, five hundred fifty-six million, eight hundred twenty thousand, seven hundred five".