201000200020021 has 4 divisors (see below), whose sum is σ = 201002374051200. Its totient is φ = 200998025988844.

The previous prime is 201000200019973. The next prime is 201000200020027. The reversal of 201000200020021 is 120020002000102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 201000200020021 - 2⁷ = 201000200019893 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 (201000200020027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1086876901 + ... + 1087061818.

It is an arithmetic number, because the mean of its divisors is an integer number (50250593512800).

Almost surely, 2^{201000200020021} is an apocalyptic number.

It is an amenable number.

201000200020021 is a deficient number, since it is larger than the sum of its proper divisors (2174031179).

201000200020021 is an equidigital number, since it uses as much as digits as its factorization.

201000200020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2174031178.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 201000200020021 its reverse (120020002000102), we get a palindrome (321020202020123).

The spelling of 201000200020021 in words is "two hundred one trillion, two hundred million, twenty thousand, twenty-one".