1331322323231 has 2 divisors, whose sum is σ = 1331322323232. Its totient is φ = 1331322323230.

The previous prime is 1331322323209. The next prime is 1331322323237. The reversal of 1331322323231 is 1323232231331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1331322323231 - 2²² = 1331318128927 is a prime.

It is a super-2 number, since 2×1331322323231² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1331322323194 and 1331322323203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1331322323237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665661161615 + 665661161616.

It is an arithmetic number, because the mean of its divisors is an integer number (665661161616).

Almost surely, 2^{1331322323231} is an apocalyptic number.

1331322323231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331322323231 is an equidigital number, since it uses as much as digits as its factorization.

1331322323231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 29.

Adding to 1331322323231 its reverse (1323232231331), we get a palindrome (2654554554562).

The spelling of 1331322323231 in words is "one trillion, three hundred thirty-one billion, three hundred twenty-two million, three hundred twenty-three thousand, two hundred thirty-one".