202022221221 has 24 divisors (see below), whose sum is σ = 300802654464. Its totient is φ = 130557834720.

The previous prime is 202022221199. The next prime is 202022221223. The reversal of 202022221221 is 122122220202.

202022221221 is a `hidden beast` number, since 20 + 202 + 2 + 221 + 221 = 666.

It is not a de Polignac number, because 202022221221 - 2¹⁸ = 202021959077 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 202022221194 and 202022221203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202022221223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1029081 + ... + 1209566.

It is an arithmetic number, because the mean of its divisors is an integer number (12533443936).

Almost surely, 2^202022221221 is an apocalyptic number.

It is an amenable number.

202022221221 is a deficient number, since it is larger than the sum of its proper divisors (98780433243).

202022221221 is a wasteful number, since it uses less digits than its factorization.

202022221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2238961 (or 2238958 counting only the distinct ones).

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

Adding to 202022221221 its reverse (122122220202), we get a palindrome (324144441423).

The spelling of 202022221221 in words is "two hundred two billion, twenty-two million, two hundred twenty-one thousand, two hundred twenty-one".