202202221221 has 96 divisors (see below), whose sum is σ = 394973429760. Its totient is φ = 96261955200.

The previous prime is 202202221187. The next prime is 202202221237. The reversal of 202202221221 is 122122202202.

202202221221 is a `hidden beast` number, since 2 + 0 + 220 + 2 + 221 + 221 = 666.

It is not a de Polignac number, because 202202221221 - 2¹⁰ = 202202220197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202202221194 and 202202221203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202202221261) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1171516 + ... + 1332986.

It is an arithmetic number, because the mean of its divisors is an integer number (4114306560).

Almost surely, 2^202202221221 is an apocalyptic number.

202202221221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

202202221221 is a deficient number, since it is larger than the sum of its proper divisors (192771208539).

202202221221 is a wasteful number, since it uses less digits than its factorization.

202202221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161647 (or 161644 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 202202221221 its reverse (122122202202), we get a palindrome (324324423423).

The spelling of 202202221221 in words is "two hundred two billion, two hundred two million, two hundred twenty-one thousand, two hundred twenty-one".