222323213221 has 4 divisors (see below), whose sum is σ = 222516370944. Its totient is φ = 222130055500.

The previous prime is 222323213197. The next prime is 222323213227. The reversal of 222323213221 is 122312323222.

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 222323213221 - 2³⁷ = 84884259749 is a prime.

It is a super-2 number, since 2×222323213221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222323213227) 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, 96577135 + ... + 96579436.

It is an arithmetic number, because the mean of its divisors is an integer number (55629092736).

Almost surely, 2^222323213221 is an apocalyptic number.

It is an amenable number.

222323213221 is a deficient number, since it is larger than the sum of its proper divisors (193157723).

222323213221 is a wasteful number, since it uses less digits than its factorization.

222323213221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193157722.

The product of its digits is 3456, while the sum is 25.

Adding to 222323213221 its reverse (122312323222), we get a palindrome (344635536443).

The spelling of 222323213221 in words is "two hundred twenty-two billion, three hundred twenty-three million, two hundred thirteen thousand, two hundred twenty-one".