202221222021 has 96 divisors (see below), whose sum is σ = 372614161920. Its totient is φ = 102829450752.

The previous prime is 202221222011. The next prime is 202221222113. The reversal of 202221222021 is 120222122202.

202221222021 is a `hidden beast` number, since 202 + 221 + 2 + 220 + 21 = 666.

202221222021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 202221222021 - 2⁶ = 202221221957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202221221985 and 202221222003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202221222011) 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 95 ways as a sum of consecutive naturals, for example, 3272416 + ... + 3333638.

It is an arithmetic number, because the mean of its divisors is an integer number (3881397520).

Almost surely, 2^202221222021 is an apocalyptic number.

202221222021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

202221222021 is a deficient number, since it is larger than the sum of its proper divisors (170392939899).

202221222021 is a wasteful number, since it uses less digits than its factorization.

202221222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61395 (or 61392 counting only the distinct ones).

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

Adding to 202221222021 its reverse (120222122202), we get a palindrome (322443344223).

The spelling of 202221222021 in words is "two hundred two billion, two hundred twenty-one million, two hundred twenty-two thousand, twenty-one".