202202421 has 4 divisors (see below), whose sum is σ = 269603232. Its totient is φ = 134801612.

The previous prime is 202202401. The next prime is 202202443. The reversal of 202202421 is 124202202.

202202421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 202202421 - 2¹³ = 202194229 is a prime.

It is a super-2 number, since 2×202202421² = 81771638116522482, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 202202421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202202401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33700401 + ... + 33700406.

It is an arithmetic number, because the mean of its divisors is an integer number (67400808).

Almost surely, 2^202202421 is an apocalyptic number.

It is an amenable number.

202202421 is a deficient number, since it is larger than the sum of its proper divisors (67400811).

202202421 is an equidigital number, since it uses as much as digits as its factorization.

202202421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67400810.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 202202421 is about 14219.7897663784. The cubic root of 202202421 is about 586.9423551824.

Adding to 202202421 its reverse (124202202), we get a palindrome (326404623).

The spelling of 202202421 in words is "two hundred two million, two hundred two thousand, four hundred twenty-one".