202200221221021 has 8 divisors (see below), whose sum is σ = 204479231951160. Its totient is φ = 199921368227328.

The previous prime is 202200221220997. The next prime is 202200221221067. The reversal of 202200221221021 is 120122122002202.

It can be written as a sum of positive squares in 4 ways, for example, as 90653059016100 + 111547162204921 = 9521190^2 + 10561589^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 202200221221021 - 2⁹ = 202200221220509 is a prime.

It is a super-2 number, since 2×202200221221021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 202200221221021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202200221221121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36854946 + ... + 41984371.

It is an arithmetic number, because the mean of its divisors is an integer number (25559903993895).

Almost surely, 2^{202200221221021} is an apocalyptic number.

It is an amenable number.

202200221221021 is a deficient number, since it is larger than the sum of its proper divisors (2279010730139).

202200221221021 is an equidigital number, since it uses as much as digits as its factorization.

202200221221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78868223.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 202200221221021 its reverse (120122122002202), we get a palindrome (322322343223223).

The spelling of 202200221221021 in words is "two hundred two trillion, two hundred billion, two hundred twenty-one million, two hundred twenty-one thousand, twenty-one".