221113331 has 2 divisors, whose sum is σ = 221113332. Its totient is φ = 221113330.

The previous prime is 221113327. The next prime is 221113363. The reversal of 221113331 is 133311122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221113331 - 2² = 221113327 is a prime.

It is a super-2 number, since 2×221113331² = 97782210291831122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (221113301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110556665 + 110556666.

It is an arithmetic number, because the mean of its divisors is an integer number (110556666).

Almost surely, 2^221113331 is an apocalyptic number.

221113331 is a deficient number, since it is larger than the sum of its proper divisors (1).

221113331 is an equidigital number, since it uses as much as digits as its factorization.

221113331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108, while the sum is 17.

The square root of 221113331 is about 14869.8799927908. The cubic root of 221113331 is about 604.6976892758.

Adding to 221113331 its reverse (133311122), we get a palindrome (354424453).

The spelling of 221113331 in words is "two hundred twenty-one million, one hundred thirteen thousand, three hundred thirty-one".