1100222221 has 8 divisors (see below), whose sum is σ = 1257606720. Its totient is φ = 942890208.

The previous prime is 1100222197. The next prime is 1100222251. The reversal of 1100222221 is 1222220011.

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 1100222221 - 2⁷ = 1100222093 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 (1100222251) 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, 56310 + ... + 73288.

It is an arithmetic number, because the mean of its divisors is an integer number (157200840).

Almost surely, 2^1100222221 is an apocalyptic number.

It is an amenable number.

1100222221 is a deficient number, since it is larger than the sum of its proper divisors (157384499).

1100222221 is an equidigital number, since it uses as much as digits as its factorization.

1100222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26243.

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

The square root of 1100222221 is about 33169.5978419998. The cubic root of 1100222221 is about 1032.3496242060.

Adding to 1100222221 its reverse (1222220011), we get a palindrome (2322442232).

The spelling of 1100222221 in words is "one billion, one hundred million, two hundred twenty-two thousand, two hundred twenty-one".