120121907 has 4 divisors (see below), whose sum is σ = 120238560. Its totient is φ = 120005256.

The previous prime is 120121901. The next prime is 120121921. The reversal of 120121907 is 709121021.

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

It is a cyclic number.

It is not a de Polignac number, because 120121907 - 2¹⁶ = 120056371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120121901) 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, 56768 + ... + 58845.

It is an arithmetic number, because the mean of its divisors is an integer number (30059640).

Almost surely, 2^120121907 is an apocalyptic number.

120121907 is a deficient number, since it is larger than the sum of its proper divisors (116653).

120121907 is a wasteful number, since it uses less digits than its factorization.

120121907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116652.

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 120121907 is about 10960.0140054655. The cubic root of 120121907 is about 493.4093852905.

Adding to 120121907 its reverse (709121021), we get a palindrome (829242928).

The spelling of 120121907 in words is "one hundred twenty million, one hundred twenty-one thousand, nine hundred seven".