202122211122221 has 16 divisors (see below), whose sum is σ = 219435740065920. Its totient is φ = 185065417828800.

The previous prime is 202122211122217. The next prime is 202122211122233. The reversal of 202122211122221 is 122221112221202.

It is a cyclic number.

It is not a de Polignac number, because 202122211122221 - 2² = 202122211122217 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 (202122211124221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92620505 + ... + 94777646.

It is an arithmetic number, because the mean of its divisors is an integer number (13714733754120).

Almost surely, 2^{202122211122221} is an apocalyptic number.

It is an amenable number.

202122211122221 is a deficient number, since it is larger than the sum of its proper divisors (17313528943699).

202122211122221 is a wasteful number, since it uses less digits than its factorization.

202122211122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187398836.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 202122211122221 its reverse (122221112221202), we get a palindrome (324343323343423).

The spelling of 202122211122221 in words is "two hundred two trillion, one hundred twenty-two billion, two hundred eleven million, one hundred twenty-two thousand, two hundred twenty-one".