202112220021 has 64 divisors (see below), whose sum is σ = 292266524160. Its totient is φ = 123901747200.

The previous prime is 202112220007. The next prime is 202112220029. The reversal of 202112220021 is 120022211202.

It is not a de Polignac number, because 202112220021 - 2¹⁴ = 202112203637 is a prime.

It is a super-2 number, since 2×202112220021² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202112220029) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 112221321 + ... + 112223121.

It is an arithmetic number, because the mean of its divisors is an integer number (4566664440).

Almost surely, 2^202112220021 is an apocalyptic number.

It is an amenable number.

202112220021 is a deficient number, since it is larger than the sum of its proper divisors (90154304139).

202112220021 is a wasteful number, since it uses less digits than its factorization.

202112220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2366.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 202112220021 its reverse (120022211202), we get a palindrome (322134431223).

The spelling of 202112220021 in words is "two hundred two billion, one hundred twelve million, two hundred twenty thousand, twenty-one".