120020121 has 24 divisors (see below), whose sum is σ = 187561920. Its totient is φ = 73516896.

The previous prime is 120020113. The next prime is 120020129. The reversal of 120020121 is 121020021.

It is an interprime number because it is at equal distance from previous prime (120020113) and next prime (120020129).

It is not a de Polignac number, because 120020121 - 2³ = 120020113 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 (120020129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24300 + ... + 28818.

It is an arithmetic number, because the mean of its divisors is an integer number (7815080).

Almost surely, 2^120020121 is an apocalyptic number.

It is an amenable number.

120020121 is a deficient number, since it is larger than the sum of its proper divisors (67541799).

120020121 is a wasteful number, since it uses less digits than its factorization.

120020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4765 (or 4762 counting only the distinct ones).

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

The square root of 120020121 is about 10955.3695054069. The cubic root of 120020121 is about 493.2699814660.

Adding to 120020121 its reverse (121020021), we get a palindrome (241040142).

It can be divided in two parts, 1200 and 20121, that added together give a triangular number (21321 = T₂₀₆).

The spelling of 120020121 in words is "one hundred twenty million, twenty thousand, one hundred twenty-one".