120688121 has 4 divisors (see below), whose sum is σ = 120877044. Its totient is φ = 120499200.

The previous prime is 120688097. The next prime is 120688123. The reversal of 120688121 is 121886021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 101284096 + 19404025 = 10064^2 + 4405^2 .

It is a cyclic number.

It is not a de Polignac number, because 120688121 - 2¹⁴ = 120671737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120688123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93500 + ... + 94781.

It is an arithmetic number, because the mean of its divisors is an integer number (30219261).

Almost surely, 2^120688121 is an apocalyptic number.

It is an amenable number.

120688121 is a deficient number, since it is larger than the sum of its proper divisors (188923).

120688121 is an equidigital number, since it uses as much as digits as its factorization.

120688121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188922.

The product of its (nonzero) digits is 1536, while the sum is 29.

The square root of 120688121 is about 10985.8145351175. The cubic root of 120688121 is about 494.1834253036.

The spelling of 120688121 in words is "one hundred twenty million, six hundred eighty-eight thousand, one hundred twenty-one".