1111233221 has 20 divisors (see below), whose sum is σ = 1364647200. Its totient is φ = 902317752.

The previous prime is 1111233217. The next prime is 1111233241. The reversal of 1111233221 is 1223321111.

It is not a de Polignac number, because 1111233221 - 2² = 1111233217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1111233221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111233241) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 33440 + ... + 57798.

It is an arithmetic number, because the mean of its divisors is an integer number (68232360).

Almost surely, 2^1111233221 is an apocalyptic number.

It is an amenable number.

1111233221 is a deficient number, since it is larger than the sum of its proper divisors (253413979).

1111233221 is an frugal number, since it uses more digits than its factorization.

1111233221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24406 (or 24385 counting only the distinct ones).

The product of its digits is 72, while the sum is 17.

The square root of 1111233221 is about 33335.1649313454. The cubic root of 1111233221 is about 1035.7821096430.

Adding to 1111233221 its reverse (1223321111), we get a palindrome (2334554332).

The spelling of 1111233221 in words is "one billion, one hundred eleven million, two hundred thirty-three thousand, two hundred twenty-one".