21021000200023 has 2 divisors, whose sum is σ = 21021000200024. Its totient is φ = 21021000200022.

The previous prime is 21021000199957. The next prime is 21021000200089. The reversal of 21021000200023 is 32000200012012.

It is a balanced prime because it is at equal distance from previous prime (21021000199957) and next prime (21021000200089).

It is a cyclic number.

It is not a de Polignac number, because 21021000200023 - 2²⁹ = 21020463329111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21021000199976 and 21021000200012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21021000200923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510500100011 + 10510500100012.

It is an arithmetic number, because the mean of its divisors is an integer number (10510500100012).

Almost surely, 2^{21021000200023} is an apocalyptic number.

21021000200023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21021000200023 is an equidigital number, since it uses as much as digits as its factorization.

21021000200023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21021000200023 its reverse (32000200012012), we get a palindrome (53021200212035).

The spelling of 21021000200023 in words is "twenty-one trillion, twenty-one billion, two hundred thousand, twenty-three".