222011221 has 8 divisors (see below), whose sum is σ = 227744640. Its totient is φ = 216319968.

The previous prime is 222011201. The next prime is 222011261. The reversal of 222011221 is 122110222.

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 222011221 - 2⁵ = 222011189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222011201) 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, 265 + ... + 21073.

It is an arithmetic number, because the mean of its divisors is an integer number (28468080).

Almost surely, 2^222011221 is an apocalyptic number.

It is an amenable number.

222011221 is a deficient number, since it is larger than the sum of its proper divisors (5733419).

222011221 is a wasteful number, since it uses less digits than its factorization.

222011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21083.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 222011221 is about 14900.0409730980. The cubic root of 222011221 is about 605.5150962366.

Adding to 222011221 its reverse (122110222), we get a palindrome (344121443).

Subtracting from 222011221 its reverse (122110222), we obtain a palindrome (99900999).

The spelling of 222011221 in words is "two hundred twenty-two million, eleven thousand, two hundred twenty-one".