231332123110021 has 2 divisors, whose sum is σ = 231332123110022. Its totient is φ = 231332123110020.

The previous prime is 231332123109881. The next prime is 231332123110057. The reversal of 231332123110021 is 120011321233132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 175611660941025 + 55720462168996 = 13251855^2 + 7464614^2 .

It is a cyclic number.

It is not a de Polignac number, because 231332123110021 - 2⁴⁷ = 90594634754693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231332123114021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115666061555010 + 115666061555011.

It is an arithmetic number, because the mean of its divisors is an integer number (115666061555011).

Almost surely, 2^{231332123110021} is an apocalyptic number.

It is an amenable number.

231332123110021 is a deficient number, since it is larger than the sum of its proper divisors (1).

231332123110021 is an equidigital number, since it uses as much as digits as its factorization.

231332123110021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 231332123110021 its reverse (120011321233132), we get a palindrome (351343444343153).

The spelling of 231332123110021 in words is "two hundred thirty-one trillion, three hundred thirty-two billion, one hundred twenty-three million, one hundred ten thousand, twenty-one".