21033312023 has 2 divisors, whose sum is σ = 21033312024. Its totient is φ = 21033312022.

The previous prime is 21033312011. The next prime is 21033312029. The reversal of 21033312023 is 32021333012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21033312023 - 2¹⁰ = 21033310999 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21033311986 and 21033312004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21033312029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10516656011 + 10516656012.

It is an arithmetic number, because the mean of its divisors is an integer number (10516656012).

Almost surely, 2^21033312023 is an apocalyptic number.

21033312023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21033312023 is an equidigital number, since it uses as much as digits as its factorization.

21033312023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21033312023 its reverse (32021333012), we get a palindrome (53054645035).

The spelling of 21033312023 in words is "twenty-one billion, thirty-three million, three hundred twelve thousand, twenty-three".