1110221221 has 4 divisors (see below), whose sum is σ = 1111186944. Its totient is φ = 1109255500.

The previous prime is 1110221191. The next prime is 1110221237. The reversal of 1110221221 is 1221220111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1110221221 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 (1110221291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 481135 + ... + 483436.

It is an arithmetic number, because the mean of its divisors is an integer number (277796736).

Almost surely, 2^1110221221 is an apocalyptic number.

It is an amenable number.

1110221221 is a deficient number, since it is larger than the sum of its proper divisors (965723).

1110221221 is an equidigital number, since it uses as much as digits as its factorization.

1110221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965722.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1110221221 is about 33319.9823079185. The cubic root of 1110221221 is about 1035.4675852515.

Adding to 1110221221 its reverse (1221220111), we get a palindrome (2331441332).

It can be divided in two parts, 11102 and 21221, that added together give a palindrome (32323).

The spelling of 1110221221 in words is "one billion, one hundred ten million, two hundred twenty-one thousand, two hundred twenty-one".