21330210023 has 2 divisors, whose sum is σ = 21330210024. Its totient is φ = 21330210022.

The previous prime is 21330209993. The next prime is 21330210043. The reversal of 21330210023 is 32001203312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21330210023 - 2²² = 21326015719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21330209983 and 21330210010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21330210043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10665105011 + 10665105012.

It is an arithmetic number, because the mean of its divisors is an integer number (10665105012).

Almost surely, 2^21330210023 is an apocalyptic number.

21330210023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21330210023 is an equidigital number, since it uses as much as digits as its factorization.

21330210023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21330210023 its reverse (32001203312), we get a palindrome (53331413335).

The spelling of 21330210023 in words is "twenty-one billion, three hundred thirty million, two hundred ten thousand, twenty-three".