222121222 has 16 divisors (see below), whose sum is σ = 336568320. Its totient is φ = 109936008.

The previous prime is 222121217. The next prime is 222121223.

222121222 is nontrivially palindromic in base 10.

222121222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 222121196 and 222121205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222121223) 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, 166723 + ... + 168049.

It is an arithmetic number, because the mean of its divisors is an integer number (21035520).

Almost surely, 2^222121222 is an apocalyptic number.

222121222 is a deficient number, since it is larger than the sum of its proper divisors (114447098).

222121222 is a wasteful number, since it uses less digits than its factorization.

222121222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2115.

The product of its digits is 128, while the sum is 16.

The square root of 222121222 is about 14903.7318145490. The cubic root of 222121222 is about 605.6150855796.

The spelling of 222121222 in words is "two hundred twenty-two million, one hundred twenty-one thousand, two hundred twenty-two".