120121138 has 4 divisors (see below), whose sum is σ = 180181710. Its totient is φ = 60060568.

The previous prime is 120121123. The next prime is 120121163. The reversal of 120121138 is 831121021.

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

It can be written as a sum of positive squares in only one way, i.e., 93257649 + 26863489 = 9657^2 + 5183^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30030283 + ... + 30030286.

Almost surely, 2^120121138 is an apocalyptic number.

120121138 is a deficient number, since it is larger than the sum of its proper divisors (60060572).

120121138 is an equidigital number, since it uses as much as digits as its factorization.

120121138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60060571.

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 120121138 is about 10959.9789233374. The cubic root of 120121138 is about 493.4083323807.

Adding to 120121138 its reverse (831121021), we get a palindrome (951242159).

The spelling of 120121138 in words is "one hundred twenty million, one hundred twenty-one thousand, one hundred thirty-eight".