221122231 has 8 divisors (see below), whose sum is σ = 241392528. Its totient is φ = 200880000.

The previous prime is 221122193. The next prime is 221122259. The reversal of 221122231 is 132221122.

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 221122231 - 2⁷ = 221122103 is a prime.

It is a super-2 number, since 2×221122231² = 97790082084834722, 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 (221122261) 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, 11631 + ... + 24031.

It is an arithmetic number, because the mean of its divisors is an integer number (30174066).

Almost surely, 2^221122231 is an apocalyptic number.

221122231 is a deficient number, since it is larger than the sum of its proper divisors (20270297).

221122231 is a wasteful number, since it uses less digits than its factorization.

221122231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14033.

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

The square root of 221122231 is about 14870.1792524502. The cubic root of 221122231 is about 604.7058023661.

Adding to 221122231 its reverse (132221122), we get a palindrome (353343353).

It can be divided in two parts, 2211 and 22231, that added together give a palindrome (24442).

The spelling of 221122231 in words is "two hundred twenty-one million, one hundred twenty-two thousand, two hundred thirty-one".