21320321333023 has 2 divisors, whose sum is σ = 21320321333024. Its totient is φ = 21320321333022.

The previous prime is 21320321332987. The next prime is 21320321333053. The reversal of 21320321333023 is 32033312302312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21320321333023 - 2²¹ = 21320319235871 is a prime.

It is a super-2 number, since 2×21320321333023² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21320321332982 and 21320321333000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21320321333053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10660160666511 + 10660160666512.

It is an arithmetic number, because the mean of its divisors is an integer number (10660160666512).

Almost surely, 2^{21320321333023} is an apocalyptic number.

21320321333023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21320321333023 is an equidigital number, since it uses as much as digits as its factorization.

21320321333023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 28.

Adding to 21320321333023 its reverse (32033312302312), we get a palindrome (53353633635335).

The spelling of 21320321333023 in words is "twenty-one trillion, three hundred twenty billion, three hundred twenty-one million, three hundred thirty-three thousand, twenty-three".