200220021021 has 4 divisors (see below), whose sum is σ = 266960028032. Its totient is φ = 133480014012.

The previous prime is 200220020989. The next prime is 200220021059. The reversal of 200220021021 is 120120022002.

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 not a de Polignac number, because 200220021021 - 2⁵ = 200220020989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200220020988 and 200220021006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200220021121) 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, 33370003501 + ... + 33370003506.

It is an arithmetic number, because the mean of its divisors is an integer number (66740007008).

Almost surely, 2^200220021021 is an apocalyptic number.

It is an amenable number.

200220021021 is a deficient number, since it is larger than the sum of its proper divisors (66740007011).

200220021021 is an equidigital number, since it uses as much as digits as its factorization.

200220021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66740007010.

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

Adding to 200220021021 its reverse (120120022002), we get a palindrome (320340043023).

The spelling of 200220021021 in words is "two hundred billion, two hundred twenty million, twenty-one thousand, twenty-one".