1111303221 has 16 divisors (see below), whose sum is σ = 1748041728. Its totient is φ = 614545200.

The previous prime is 1111303211. The next prime is 1111303231. The reversal of 1111303221 is 1223031111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1111303211) and next prime (1111303231).

It is not a de Polignac number, because 1111303221 - 2⁵ = 1111303189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1111303221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111303211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 852885 + ... + 854186.

It is an arithmetic number, because the mean of its divisors is an integer number (109252608).

Almost surely, 2^1111303221 is an apocalyptic number.

It is an amenable number.

1111303221 is a deficient number, since it is larger than the sum of its proper divisors (636738507).

1111303221 is a wasteful number, since it uses less digits than its factorization.

1111303221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1707112.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1111303221 is about 33336.2148571190. The cubic root of 1111303221 is about 1035.8038582205.

Adding to 1111303221 its reverse (1223031111), we get a palindrome (2334334332).

The spelling of 1111303221 in words is "one billion, one hundred eleven million, three hundred three thousand, two hundred twenty-one".