231321103231 has 2 divisors, whose sum is σ = 231321103232. Its totient is φ = 231321103230.

The previous prime is 231321103171. The next prime is 231321103283. The reversal of 231321103231 is 132301123132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231321103231 - 2⁷ = 231321103103 is a prime.

It is a super-2 number, since 2×231321103231² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231321103331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115660551615 + 115660551616.

It is an arithmetic number, because the mean of its divisors is an integer number (115660551616).

Almost surely, 2^231321103231 is an apocalyptic number.

231321103231 is a deficient number, since it is larger than the sum of its proper divisors (1).

231321103231 is an equidigital number, since it uses as much as digits as its factorization.

231321103231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 231321103231 its reverse (132301123132), we get a palindrome (363622226363).

The spelling of 231321103231 in words is "two hundred thirty-one billion, three hundred twenty-one million, one hundred three thousand, two hundred thirty-one".