120100200021 has 24 divisors (see below), whose sum is σ = 190547997120. Its totient is φ = 72554809536.

The previous prime is 120100200019. The next prime is 120100200053. The reversal of 120100200021 is 120002001021.

It is not a de Polignac number, because 120100200021 - 2¹ = 120100200019 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 120100199976 and 120100200012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120100200821) 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, 15264336 + ... + 15272201.

It is an arithmetic number, because the mean of its divisors is an integer number (7939499880).

Almost surely, 2^120100200021 is an apocalyptic number.

It is an amenable number.

120100200021 is a deficient number, since it is larger than the sum of its proper divisors (70447797099).

120100200021 is a wasteful number, since it uses less digits than its factorization.

120100200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30536585 (or 30536582 counting only the distinct ones).

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

Adding to 120100200021 its reverse (120002001021), we get a palindrome (240102201042).

The spelling of 120100200021 in words is "one hundred twenty billion, one hundred million, two hundred thousand, twenty-one".