21232331033723 has 2 divisors, whose sum is σ = 21232331033724. Its totient is φ = 21232331033722.

The previous prime is 21232331033713. The next prime is 21232331033759. The reversal of 21232331033723 is 32733013323212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21232331033723 - 2⁸ = 21232331033467 is a prime.

It is a super-2 number, since 2×21232331033723² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21232331033713) 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, 10616165516861 + 10616165516862.

It is an arithmetic number, because the mean of its divisors is an integer number (10616165516862).

Almost surely, 2^{21232331033723} is an apocalyptic number.

21232331033723 is a deficient number, since it is larger than the sum of its proper divisors (1).

21232331033723 is an equidigital number, since it uses as much as digits as its factorization.

21232331033723 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 35.

Adding to 21232331033723 its reverse (32733013323212), we get a palindrome (53965344356935).

The spelling of 21232331033723 in words is "twenty-one trillion, two hundred thirty-two billion, three hundred thirty-one million, thirty-three thousand, seven hundred twenty-three".