222133221 has 12 divisors (see below), whose sum is σ = 321183148. Its totient is φ = 147939264.

The previous prime is 222133193. The next prime is 222133273. The reversal of 222133221 is 122331222.

It can be written as a sum of positive squares in 2 ways, for example, as 209960100 + 12173121 = 14490^2 + 3489^2 .

It is not a de Polignac number, because 222133221 - 2¹⁷ = 222002149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222133194 and 222133203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222133291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2650 + ... + 21243.

Almost surely, 2^222133221 is an apocalyptic number.

It is an amenable number.

222133221 is a deficient number, since it is larger than the sum of its proper divisors (99049927).

222133221 is a wasteful number, since it uses less digits than its factorization.

222133221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24932 (or 24929 counting only the distinct ones).

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

The square root of 222133221 is about 14904.1343592978. The cubic root of 222133221 is about 605.6259905028.

Adding to 222133221 its reverse (122331222), we get a palindrome (344464443).

The spelling of 222133221 in words is "two hundred twenty-two million, one hundred thirty-three thousand, two hundred twenty-one".