202201200221021 has 8 divisors (see below), whose sum is σ = 204474178092600. Its totient is φ = 199928245777920.

The previous prime is 202201200220993. The next prime is 202201200221077. The reversal of 202201200221021 is 120122002102202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1064673148900 + 201136527072121 = 1031830^2 + 14182261^2 .

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 202201200221021 - 2⁴⁶ = 131832456043357 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 (202201200221921) 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 7 ways as a sum of consecutive naturals, for example, 11798501 + ... + 23315381.

It is an arithmetic number, because the mean of its divisors is an integer number (25559272261575).

Almost surely, 2^{202201200221021} is an apocalyptic number.

It is an amenable number.

202201200221021 is a deficient number, since it is larger than the sum of its proper divisors (2272977871579).

202201200221021 is a wasteful number, since it uses less digits than its factorization.

202201200221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11714239.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 202201200221021 its reverse (120122002102202), we get a palindrome (322323202323223).

The spelling of 202201200221021 in words is "two hundred two trillion, two hundred one billion, two hundred million, two hundred twenty-one thousand, twenty-one".