331122121 has 8 divisors (see below), whose sum is σ = 361454688. Its totient is φ = 300828000.

The previous prime is 331122083. The next prime is 331122149. The reversal of 331122121 is 121221133.

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

It is not a de Polignac number, because 331122121 - 2¹⁹ = 330597833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 331122095 and 331122104.

It is not an unprimeable number, because it can be changed into a prime (331122151) 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, 10186 + ... + 27676.

It is an arithmetic number, because the mean of its divisors is an integer number (45181836).

Almost surely, 2^331122121 is an apocalyptic number.

It is an amenable number.

331122121 is a deficient number, since it is larger than the sum of its proper divisors (30332567).

331122121 is a wasteful number, since it uses less digits than its factorization.

331122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19223.

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

The square root of 331122121 is about 18196.7612777659. The cubic root of 331122121 is about 691.8247026377.

Adding to 331122121 its reverse (121221133), we get a palindrome (452343254).

The spelling of 331122121 in words is "three hundred thirty-one million, one hundred twenty-two thousand, one hundred twenty-one".