21000023003023 has 2 divisors, whose sum is σ = 21000023003024. Its totient is φ = 21000023003022.

The previous prime is 21000023002991. The next prime is 21000023003111. The reversal of 21000023003023 is 32030032000012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21000023003023 - 2⁵ = 21000023002991 is a prime.

It is a super-2 number, since 2×21000023003023² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21000023002988 and 21000023003006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21000023003423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500011501511 + 10500011501512.

It is an arithmetic number, because the mean of its divisors is an integer number (10500011501512).

Almost surely, 2^{21000023003023} is an apocalyptic number.

21000023003023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000023003023 is an equidigital number, since it uses as much as digits as its factorization.

21000023003023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 16.

Adding to 21000023003023 its reverse (32030032000012), we get a palindrome (53030055003035).

The spelling of 21000023003023 in words is "twenty-one trillion, twenty-three million, three thousand, twenty-three".