331121090 has 8 divisors (see below), whose sum is σ = 596017980. Its totient is φ = 132448432.

The previous prime is 331121081. The next prime is 331121099. The reversal of 331121090 is 90121133.

It is an interprime number because it is at equal distance from previous prime (331121081) and next prime (331121099).

It can be written as a sum of positive squares in 2 ways, for example, as 307335961 + 23785129 = 17531^2 + 4877^2 .

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

It is not an unprimeable number, because it can be changed into a prime (331121099) 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, 16556045 + ... + 16556064.

Almost surely, 2^331121090 is an apocalyptic number.

331121090 is a deficient number, since it is larger than the sum of its proper divisors (264896890).

331121090 is a wasteful number, since it uses less digits than its factorization.

331121090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33112116.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 331121090 is about 18196.7329485268. The cubic root of 331121090 is about 691.8239846025.

The spelling of 331121090 in words is "three hundred thirty-one million, one hundred twenty-one thousand, ninety".