202112221 has 8 divisors (see below), whose sum is σ = 207434304. Its totient is φ = 196859040.

The previous prime is 202112213. The next prime is 202112227. The reversal of 202112221 is 122211202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 202112221 - 2³ = 202112213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202112227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11256 + ... + 23041.

It is an arithmetic number, because the mean of its divisors is an integer number (25929288).

Almost surely, 2^202112221 is an apocalyptic number.

It is an amenable number.

202112221 is a deficient number, since it is larger than the sum of its proper divisors (5322083).

202112221 is an equidigital number, since it uses as much as digits as its factorization.

202112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34451.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 202112221 is about 14216.6177763911. The cubic root of 202112221 is about 586.8550662924.

Adding to 202112221 its reverse (122211202), we get a palindrome (324323423).

The spelling of 202112221 in words is "two hundred two million, one hundred twelve thousand, two hundred twenty-one".