222110221 has 4 divisors (see below), whose sum is σ = 222255712. Its totient is φ = 221964732.

The previous prime is 222110153. The next prime is 222110249. The reversal of 222110221 is 122011222.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-222110221 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 (222110521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70431 + ... + 73516.

It is an arithmetic number, because the mean of its divisors is an integer number (55563928).

Almost surely, 2^222110221 is an apocalyptic number.

It is an amenable number.

222110221 is a deficient number, since it is larger than the sum of its proper divisors (145491).

222110221 is a wasteful number, since it uses less digits than its factorization.

222110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145490.

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

The square root of 222110221 is about 14903.3627413413. The cubic root of 222110221 is about 605.6050873131.

Adding to 222110221 its reverse (122011222), we get a palindrome (344121443).

The spelling of 222110221 in words is "two hundred twenty-two million, one hundred ten thousand, two hundred twenty-one".