202220222000021 has 4 divisors (see below), whose sum is σ = 209193333103500. Its totient is φ = 195247110896544.

The previous prime is 202220222000011. The next prime is 202220222000047. The reversal of 202220222000021 is 120000222022202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 114605267998225 + 87614954001796 = 10705385^2 + 9360286^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202220222000021 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 (202220222000011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3486555551696 + ... + 3486555551753.

It is an arithmetic number, because the mean of its divisors is an integer number (52298333275875).

Almost surely, 2^{202220222000021} is an apocalyptic number.

It is an amenable number.

202220222000021 is a deficient number, since it is larger than the sum of its proper divisors (6973111103479).

202220222000021 is an equidigital number, since it uses as much as digits as its factorization.

202220222000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6973111103478.

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 202220222000021 its reverse (120000222022202), we get a palindrome (322220444022223).

The spelling of 202220222000021 in words is "two hundred two trillion, two hundred twenty billion, two hundred twenty-two million, twenty-one", and thus it is an aban number.