222333221 has 4 divisors (see below), whose sum is σ = 242545344. Its totient is φ = 202121100.

The previous prime is 222333211. The next prime is 222333233. The reversal of 222333221 is 122333222.

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-222333221 is a prime.

It is a super-2 number, since 2×222333221² = 98864122320469682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222333193 and 222333202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222333211) 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, 10106045 + ... + 10106066.

It is an arithmetic number, because the mean of its divisors is an integer number (60636336).

Almost surely, 2^222333221 is an apocalyptic number.

It is an amenable number.

222333221 is a deficient number, since it is larger than the sum of its proper divisors (20212123).

222333221 is a wasteful number, since it uses less digits than its factorization.

222333221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20212122.

The product of its digits is 864, while the sum is 20.

The square root of 222333221 is about 14910.8423973966. The cubic root of 222333221 is about 605.8076965733.

Adding to 222333221 its reverse (122333222), we get a palindrome (344666443).

Subtracting from 222333221 its reverse (122333222), we obtain a palindrome (99999999).

The spelling of 222333221 in words is "two hundred twenty-two million, three hundred thirty-three thousand, two hundred twenty-one".