202200021 has 24 divisors (see below), whose sum is σ = 299981760. Its totient is φ = 131193216.

The previous prime is 202200001. The next prime is 202200029. The reversal of 202200021 is 120002202.

202200021 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 202200021 - 2¹¹ = 202197973 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 202199976 and 202200012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202200029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52845 + ... + 56541.

It is an arithmetic number, because the mean of its divisors is an integer number (12499240).

Almost surely, 2^202200021 is an apocalyptic number.

It is an amenable number.

202200021 is a deficient number, since it is larger than the sum of its proper divisors (97781739).

202200021 is a wasteful number, since it uses less digits than its factorization.

202200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3865 (or 3862 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 202200021 is about 14219.7053766947. The cubic root of 202200021 is about 586.9400329761.

Adding to 202200021 its reverse (120002202), we get a palindrome (322202223).

The spelling of 202200021 in words is "two hundred two million, two hundred thousand, twenty-one".