120000020121 has 24 divisors (see below), whose sum is σ = 189449754624. Its totient is φ = 72865284480.

The previous prime is 120000020093. The next prime is 120000020123. The reversal of 120000020121 is 121020000021.

It is not a de Polignac number, because 120000020121 - 2¹⁷ = 119999889049 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 (120000020123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12645481 + ... + 12654966.

It is an arithmetic number, because the mean of its divisors is an integer number (7893739776).

Almost surely, 2^120000020121 is an apocalyptic number.

It is an amenable number.

120000020121 is a deficient number, since it is larger than the sum of its proper divisors (69449734503).

120000020121 is a wasteful number, since it uses less digits than its factorization.

120000020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25300501 (or 25300498 counting only the distinct ones).

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

Adding to 120000020121 its reverse (121020000021), we get a palindrome (241020020142).

The spelling of 120000020121 in words is "one hundred twenty billion, twenty thousand, one hundred twenty-one".