222121272 has 32 divisors (see below), whose sum is σ = 568849680. Its totient is φ = 72234240.

The previous prime is 222121271. The next prime is 222121283. The reversal of 222121272 is 272121222.

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, 111883 + ... + 113850.

Almost surely, 2^222121272 is an apocalyptic number.

It is an amenable number.

222121272 is an abundant number, since it is smaller than the sum of its proper divisors (346728408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

222121272 is a wasteful number, since it uses less digits than its factorization.

222121272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225783 (or 225779 counting only the distinct ones).

The product of its digits is 448, while the sum is 21.

The square root of 222121272 is about 14903.7334919811. The cubic root of 222121272 is about 605.6151310214.

Adding to 222121272 its reverse (272121222), we get a palindrome (494242494).

The spelling of 222121272 in words is "two hundred twenty-two million, one hundred twenty-one thousand, two hundred seventy-two".