331252243121 has 4 divisors (see below), whose sum is σ = 335917767744. Its totient is φ = 326586718500.

The previous prime is 331252243117. The next prime is 331252243159. The reversal of 331252243121 is 121342252133.

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, and also an emirpimes, since its reverse is a distinct semiprime: 121342252133 = 4621 ⋅26258873.

It is a cyclic number.

It is not a de Polignac number, because 331252243121 - 2² = 331252243117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331252243181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2332762205 + ... + 2332762346.

It is an arithmetic number, because the mean of its divisors is an integer number (83979441936).

Almost surely, 2^331252243121 is an apocalyptic number.

It is an amenable number.

331252243121 is a deficient number, since it is larger than the sum of its proper divisors (4665524623).

331252243121 is an equidigital number, since it uses as much as digits as its factorization.

331252243121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4665524622.

The product of its digits is 8640, while the sum is 29.

Adding to 331252243121 its reverse (121342252133), we get a palindrome (452594495254).

The spelling of 331252243121 in words is "three hundred thirty-one billion, two hundred fifty-two million, two hundred forty-three thousand, one hundred twenty-one".