12531335331 has 8 divisors (see below), whose sum is σ = 16709745744. Its totient is φ = 8353574240.

The previous prime is 12531335321. The next prime is 12531335363. The reversal of 12531335331 is 13353313521.

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 12531335331 - 2²¹ = 12529238179 is a prime.

It is a super-2 number, since 2×12531335331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12531335321) 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, 115356 + ... + 195881.

It is an arithmetic number, because the mean of its divisors is an integer number (2088718218).

Almost surely, 2^12531335331 is an apocalyptic number.

12531335331 is a deficient number, since it is larger than the sum of its proper divisors (4178410413).

12531335331 is a wasteful number, since it uses less digits than its factorization.

12531335331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324661.

The product of its digits is 12150, while the sum is 30.

Adding to 12531335331 its reverse (13353313521), we get a palindrome (25884648852).

The spelling of 12531335331 in words is "twelve billion, five hundred thirty-one million, three hundred thirty-five thousand, three hundred thirty-one".