222121231 has 8 divisors (see below), whose sum is σ = 234880128. Its totient is φ = 209712000.

The previous prime is 222121223. The next prime is 222121247. The reversal of 222121231 is 132121222.

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 222121231 - 2³ = 222121223 is a prime.

It is a super-2 number, since 2×222121231² = 98675682521910722, which 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 (222121271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86110 + ... + 88651.

It is an arithmetic number, because the mean of its divisors is an integer number (29360016).

Almost surely, 2^222121231 is an apocalyptic number.

222121231 is a deficient number, since it is larger than the sum of its proper divisors (12758897).

222121231 is a wasteful number, since it uses less digits than its factorization.

222121231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174833.

The product of its digits is 96, while the sum is 16.

The square root of 222121231 is about 14903.7321164868. The cubic root of 222121231 is about 605.6150937592.

Adding to 222121231 its reverse (132121222), we get a palindrome (354242453).

Subtracting from 222121231 its reverse (132121222), we obtain a palindrome (90000009).

The spelling of 222121231 in words is "two hundred twenty-two million, one hundred twenty-one thousand, two hundred thirty-one".