120556121 has 12 divisors (see below), whose sum is σ = 147620880. Its totient is φ = 97894440.

The previous prime is 120556109. The next prime is 120556123. The reversal of 120556121 is 121655021.

It is a happy number.

It is not a de Polignac number, because 120556121 - 2²⁶ = 53447257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (120556123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63815 + ... + 65676.

It is an arithmetic number, because the mean of its divisors is an integer number (12301740).

Almost surely, 2^120556121 is an apocalyptic number.

It is an amenable number.

120556121 is a deficient number, since it is larger than the sum of its proper divisors (27064759).

120556121 is a wasteful number, since it uses less digits than its factorization.

120556121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129524 (or 129517 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 120556121 is about 10979.8051439905. The cubic root of 120556121 is about 494.0031921314.

The spelling of 120556121 in words is "one hundred twenty million, five hundred fifty-six thousand, one hundred twenty-one".