120002121 has 32 divisors (see below), whose sum is σ = 186426240. Its totient is φ = 76204800.

The previous prime is 120002117. The next prime is 120002131. The reversal of 120002121 is 121200021.

It is not a de Polignac number, because 120002121 - 2² = 120002117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (120002111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46341 + ... + 48861.

It is an arithmetic number, because the mean of its divisors is an integer number (5825820).

Almost surely, 2^120002121 is an apocalyptic number.

It is an amenable number.

120002121 is a deficient number, since it is larger than the sum of its proper divisors (66424119).

120002121 is a wasteful number, since it uses less digits than its factorization.

120002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2614 (or 2608 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 120002121 is about 10954.5479596376. The cubic root of 120002121 is about 493.2453208689.

Adding to 120002121 its reverse (121200021), we get a palindrome (241202142).

The spelling of 120002121 in words is "one hundred twenty million, two thousand, one hundred twenty-one".