202220112021021 has 6 divisors (see below), whose sum is σ = 292095717363710. Its totient is φ = 134813408014008.

The previous prime is 202220112020999. The next prime is 202220112021073. The reversal of 202220112021021 is 120120211022202.

It is a happy number.

202220112021021 is a `hidden beast` number, since 202 + 220 + 1 + 12 + 0 + 210 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 165712970432025 + 36507141588996 = 12872955^2 + 6042114^2 .

It is not a de Polignac number, because 202220112021021 - 2⁶ = 202220112020957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202220112020985 and 202220112021003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202220112021821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11234450667826 + ... + 11234450667843.

Almost surely, 2^{202220112021021} is an apocalyptic number.

It is an amenable number.

202220112021021 is a deficient number, since it is larger than the sum of its proper divisors (89875605342689).

202220112021021 is a wasteful number, since it uses less digits than its factorization.

202220112021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22468901335675 (or 22468901335672 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 202220112021021 its reverse (120120211022202), we get a palindrome (322340323043223).

The spelling of 202220112021021 in words is "two hundred two trillion, two hundred twenty billion, one hundred twelve million, twenty-one thousand, twenty-one".