202221210021 has 16 divisors (see below), whose sum is σ = 272019384000. Its totient is φ = 133622465408.

The previous prime is 202221210019. The next prime is 202221210067. The reversal of 202221210021 is 120012122202.

202221210021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 202221210021 - 2¹ = 202221210019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202221210221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 275616 + ... + 693113.

It is an arithmetic number, because the mean of its divisors is an integer number (17001211500).

Almost surely, 2^202221210021 is an apocalyptic number.

It is an amenable number.

202221210021 is a deficient number, since it is larger than the sum of its proper divisors (69798173979).

202221210021 is a wasteful number, since it uses less digits than its factorization.

202221210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969348.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 202221210021 its reverse (120012122202), we get a palindrome (322233332223).

The spelling of 202221210021 in words is "two hundred two billion, two hundred twenty-one million, two hundred ten thousand, twenty-one".