331112221 has 8 divisors (see below), whose sum is σ = 380224800. Its totient is φ = 285168240.

The previous prime is 331112203. The next prime is 331112237. The reversal of 331112221 is 122211133.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 331112221 - 2⁹ = 331111709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 331112195 and 331112204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331112251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 791926 + ... + 792343.

It is an arithmetic number, because the mean of its divisors is an integer number (47528100).

Almost surely, 2^331112221 is an apocalyptic number.

It is an amenable number.

331112221 is a deficient number, since it is larger than the sum of its proper divisors (49112579).

331112221 is a wasteful number, since it uses less digits than its factorization.

331112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584299.

The product of its digits is 72, while the sum is 16.

The square root of 331112221 is about 18196.4892493030. The cubic root of 331112221 is about 691.8178077668.

Adding to 331112221 its reverse (122211133), we get a palindrome (453323354).

The spelling of 331112221 in words is "three hundred thirty-one million, one hundred twelve thousand, two hundred twenty-one".