221112329 has 4 divisors (see below), whose sum is σ = 232749840. Its totient is φ = 209474820.

The previous prime is 221112313. The next prime is 221112337. The reversal of 221112329 is 923211122.

It is a happy number.

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 not a de Polignac number, because 221112329 - 2⁴ = 221112313 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (221112349) 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 3 ways as a sum of consecutive naturals, for example, 5818727 + ... + 5818764.

It is an arithmetic number, because the mean of its divisors is an integer number (58187460).

Almost surely, 2^221112329 is an apocalyptic number.

It is an amenable number.

221112329 is a deficient number, since it is larger than the sum of its proper divisors (11637511).

221112329 is a wasteful number, since it uses less digits than its factorization.

221112329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11637510.

The product of its digits is 432, while the sum is 23.

The square root of 221112329 is about 14869.8463004834. The cubic root of 221112329 is about 604.6967758559.

The spelling of 221112329 in words is "two hundred twenty-one million, one hundred twelve thousand, three hundred twenty-nine".