222202021 has 4 divisors (see below), whose sum is σ = 222267232. Its totient is φ = 222136812.

The previous prime is 222201989. The next prime is 222202033. The reversal of 222202021 is 120202222.

222202021 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 222202021 - 2⁵ = 222201989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222201992 and 222202010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222202051) 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, 27195 + ... + 34408.

It is an arithmetic number, because the mean of its divisors is an integer number (55566808).

Almost surely, 2^222202021 is an apocalyptic number.

It is an amenable number.

222202021 is a deficient number, since it is larger than the sum of its proper divisors (65211).

222202021 is an equidigital number, since it uses as much as digits as its factorization.

222202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65210.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 222202021 is about 14906.4422650074. The cubic root of 222202021 is about 605.6885096927.

Adding to 222202021 its reverse (120202222), we get a palindrome (342404243).

The spelling of 222202021 in words is "two hundred twenty-two million, two hundred two thousand, twenty-one".