202222021221 has 48 divisors (see below), whose sum is σ = 346516118208. Its totient is φ = 112231872000.

The previous prime is 202222021219. The next prime is 202222021247. The reversal of 202222021221 is 122120222202.

202222021221 is a `hidden beast` number, since 20 + 222 + 202 + 1 + 221 = 666.

It is not a de Polignac number, because 202222021221 - 2¹ = 202222021219 is a prime.

It is a super-3 number, since 3×202222021221³ (a number of 35 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 202222021194 and 202222021203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202222028221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1561455 + ... + 1685996.

It is an arithmetic number, because the mean of its divisors is an integer number (7219085796).

Almost surely, 2^202222021221 is an apocalyptic number.

It is an amenable number.

202222021221 is a deficient number, since it is larger than the sum of its proper divisors (144294096987).

202222021221 is a wasteful number, since it uses less digits than its factorization.

202222021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3247522 (or 3247519 counting only the distinct ones).

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

Adding to 202222021221 its reverse (122120222202), we get a palindrome (324342243423).

The spelling of 202222021221 in words is "two hundred two billion, two hundred twenty-two million, twenty-one thousand, two hundred twenty-one".