202212112021 has 16 divisors (see below), whose sum is σ = 211389338160. Its totient is φ = 193187635200.

The previous prime is 202212112013. The next prime is 202212112027. The reversal of 202212112021 is 120211212202.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 265233796 + 201946878225 = 16286^2 + 449385^2 .

It is a cyclic number.

It is not a de Polignac number, because 202212112021 - 2³ = 202212112013 is a prime.

It is a super-3 number, since 3×202212112021³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202212111986 and 202212112004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202212112027) 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, 1918141 + ... + 2020813.

It is an arithmetic number, because the mean of its divisors is an integer number (13211833635).

Almost surely, 2^202212112021 is an apocalyptic number.

It is an amenable number.

202212112021 is a deficient number, since it is larger than the sum of its proper divisors (9177226139).

202212112021 is a wasteful number, since it uses less digits than its factorization.

202212112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103416.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 202212112021 its reverse (120211212202), we get a palindrome (322423324223).

The spelling of 202212112021 in words is "two hundred two billion, two hundred twelve million, one hundred twelve thousand, twenty-one".