21231023010943 has 2 divisors, whose sum is σ = 21231023010944. Its totient is φ = 21231023010942.

The previous prime is 21231023010893. The next prime is 21231023011073. The reversal of 21231023010943 is 34901032013212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21231023010943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21231023710943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10615511505471 + 10615511505472.

It is an arithmetic number, because the mean of its divisors is an integer number (10615511505472).

Almost surely, 2^{21231023010943} is an apocalyptic number.

21231023010943 is a deficient number, since it is larger than the sum of its proper divisors (1).

21231023010943 is an equidigital number, since it uses as much as digits as its factorization.

21231023010943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 31.

The spelling of 21231023010943 in words is "twenty-one trillion, two hundred thirty-one billion, twenty-three million, ten thousand, nine hundred forty-three".