231103132021 has 2 divisors, whose sum is σ = 231103132022. Its totient is φ = 231103132020.

The previous prime is 231103131997. The next prime is 231103132031. The reversal of 231103132021 is 120231301132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204367284900 + 26735847121 = 452070^2 + 163511^2 .

It is a cyclic number.

It is not a de Polignac number, because 231103132021 - 2⁵ = 231103131989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231103132021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231103132031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115551566010 + 115551566011.

It is an arithmetic number, because the mean of its divisors is an integer number (115551566011).

Almost surely, 2^231103132021 is an apocalyptic number.

It is an amenable number.

231103132021 is a deficient number, since it is larger than the sum of its proper divisors (1).

231103132021 is an equidigital number, since it uses as much as digits as its factorization.

231103132021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 231103132021 its reverse (120231301132), we get a palindrome (351334433153).

The spelling of 231103132021 in words is "two hundred thirty-one billion, one hundred three million, one hundred thirty-two thousand, twenty-one".