222121323 has 24 divisors (see below), whose sum is σ = 330817968. Its totient is φ = 143508672.

The previous prime is 222121309. The next prime is 222121351. The reversal of 222121323 is 323121222.

222121323 is a `hidden beast` number, since 222 + 121 + 323 = 666.

It is not a de Polignac number, because 222121323 - 2⁴ = 222121307 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222121296 and 222121305.

It is not an unprimeable number, because it can be changed into a prime (222121223) 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 23 ways as a sum of consecutive naturals, for example, 93061 + ... + 95417.

It is an arithmetic number, because the mean of its divisors is an integer number (13784082).

Almost surely, 2^222121323 is an apocalyptic number.

222121323 is a deficient number, since it is larger than the sum of its proper divisors (108696645).

222121323 is a wasteful number, since it uses less digits than its factorization.

222121323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2683 (or 2680 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 222121323 is about 14903.7352029617. The cubic root of 222121323 is about 605.6151773720.

Adding to 222121323 its reverse (323121222), we get a palindrome (545242545).

The spelling of 222121323 in words is "two hundred twenty-two million, one hundred twenty-one thousand, three hundred twenty-three".