202000220100021 has 12 divisors (see below), whose sum is σ = 313306463828832. Its totient is φ = 115428697199928.

The previous prime is 202000220099879. The next prime is 202000220100023. The reversal of 202000220100021 is 120001022000202.

It is a de Polignac number, because none of the positive numbers 2^k-202000220100021 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202000220100023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 687075578425 + ... + 687075578718.

It is an arithmetic number, because the mean of its divisors is an integer number (26108871985736).

Almost surely, 2^{202000220100021} is an apocalyptic number.

202000220100021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

202000220100021 is a deficient number, since it is larger than the sum of its proper divisors (111306243728811).

202000220100021 is a wasteful number, since it uses less digits than its factorization.

202000220100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1374151157160 (or 1374151157153 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 202000220100021 its reverse (120001022000202), we get a palindrome (322001242100223).

The spelling of 202000220100021 in words is "two hundred two trillion, two hundred twenty million, one hundred thousand, twenty-one".