231322323221131 has 2 divisors, whose sum is σ = 231322323221132. Its totient is φ = 231322323221130.

The previous prime is 231322323221123. The next prime is 231322323221137. The reversal of 231322323221131 is 131122323223132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231322323221131 - 2³ = 231322323221123 is a prime.

It is a super-2 number, since 2×231322323221131² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231322323221093 and 231322323221102.

It is not a weakly prime, because it can be changed into another prime (231322323221137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115661161610565 + 115661161610566.

It is an arithmetic number, because the mean of its divisors is an integer number (115661161610566).

Almost surely, 2^{231322323221131} is an apocalyptic number.

231322323221131 is a deficient number, since it is larger than the sum of its proper divisors (1).

231322323221131 is an equidigital number, since it uses as much as digits as its factorization.

231322323221131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 31.

Adding to 231322323221131 its reverse (131122323223132), we get a palindrome (362444646444263).

The spelling of 231322323221131 in words is "two hundred thirty-one trillion, three hundred twenty-two billion, three hundred twenty-three million, two hundred twenty-one thousand, one hundred thirty-one".