231321123149 has 2 divisors, whose sum is σ = 231321123150. Its totient is φ = 231321123148.

The previous prime is 231321123101. The next prime is 231321123193. The reversal of 231321123149 is 941321123132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 221104967524 + 10216155625 = 470218^2 + 101075^2 .

It is a cyclic number.

It is not a de Polignac number, because 231321123149 - 2¹⁶ = 231321057613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231321123199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115660561574 + 115660561575.

It is an arithmetic number, because the mean of its divisors is an integer number (115660561575).

Almost surely, 2^231321123149 is an apocalyptic number.

It is an amenable number.

231321123149 is a deficient number, since it is larger than the sum of its proper divisors (1).

231321123149 is an equidigital number, since it uses as much as digits as its factorization.

231321123149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 32.

The spelling of 231321123149 in words is "two hundred thirty-one billion, three hundred twenty-one million, one hundred twenty-three thousand, one hundred forty-nine".