1331321213231 has 8 divisors (see below), whose sum is σ = 1410889485744. Its totient is φ = 1251892414080.

The previous prime is 1331321213227. The next prime is 1331321213323. The reversal of 1331321213231 is 1323121231331.

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

It is not a de Polignac number, because 1331321213231 - 2² = 1331321213227 is a prime.

It is a super-2 number, since 2×1331321213231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1331321213231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331321218231) 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, 34848680 + ... + 34886861.

It is an arithmetic number, because the mean of its divisors is an integer number (176361185718).

Almost surely, 2^{1331321213231} is an apocalyptic number.

1331321213231 is a deficient number, since it is larger than the sum of its proper divisors (79568272513).

1331321213231 is a wasteful number, since it uses less digits than its factorization.

1331321213231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69736681.

The product of its digits is 1944, while the sum is 26.

Adding to 1331321213231 its reverse (1323121231331), we get a palindrome (2654442444562).

The spelling of 1331321213231 in words is "one trillion, three hundred thirty-one billion, three hundred twenty-one million, two hundred thirteen thousand, two hundred thirty-one".