331120221 has 4 divisors (see below), whose sum is σ = 441493632. Its totient is φ = 220746812.

The previous prime is 331120219. The next prime is 331120241. The reversal of 331120221 is 122021133.

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 331120221 - 2¹ = 331120219 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 331120221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331120211) 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 in 3 ways as a sum of consecutive naturals, for example, 55186701 + ... + 55186706.

It is an arithmetic number, because the mean of its divisors is an integer number (110373408).

Almost surely, 2^331120221 is an apocalyptic number.

It is an amenable number.

331120221 is a deficient number, since it is larger than the sum of its proper divisors (110373411).

331120221 is a wasteful number, since it uses less digits than its factorization.

331120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110373410.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 331120221 is about 18196.7090705985. The cubic root of 331120221 is about 691.8233793903.

Adding to 331120221 its reverse (122021133), we get a palindrome (453141354).

It can be divided in two parts, 3311 and 20221, that added together give a palindrome (23532).

The spelling of 331120221 in words is "three hundred thirty-one million, one hundred twenty thousand, two hundred twenty-one".