120001202100021 has 48 divisors (see below), whose sum is σ = 180642813009344. Its totient is φ = 70754523840000.

The previous prime is 120001202100007. The next prime is 120001202100049.

120001202100021 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 120001202100021 - 2⁷ = 120001202099893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120001202150021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 121609821 + ... + 122592621.

Almost surely, 2^{120001202100021} is an apocalyptic number.

120001202100021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

120001202100021 is a deficient number, since it is larger than the sum of its proper divisors (60641610909323).

120001202100021 is a wasteful number, since it uses less digits than its factorization.

120001202100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991954 (or 991943 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

It can be divided in two parts, 12000120 and 2100021, that added together give a palindrome (14100141).

The spelling of 120001202100021 in words is "one hundred twenty trillion, one billion, two hundred two million, one hundred thousand, twenty-one".