231021102203987 has 2 divisors, whose sum is σ = 231021102203988. Its totient is φ = 231021102203986.

The previous prime is 231021102203929. The next prime is 231021102203989. The reversal of 231021102203987 is 789302201120132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231021102203987 - 2¹⁰ = 231021102202963 is a prime.

Together with 231021102203989, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (231021102203989) 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, 115510551101993 + 115510551101994.

It is an arithmetic number, because the mean of its divisors is an integer number (115510551101994).

Almost surely, 2^{231021102203987} is an apocalyptic number.

231021102203987 is a deficient number, since it is larger than the sum of its proper divisors (1).

231021102203987 is an equidigital number, since it uses as much as digits as its factorization.

231021102203987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 41.

The spelling of 231021102203987 in words is "two hundred thirty-one trillion, twenty-one billion, one hundred two million, two hundred three thousand, nine hundred eighty-seven".