21023441413223 has 2 divisors, whose sum is σ = 21023441413224. Its totient is φ = 21023441413222.

The previous prime is 21023441413201. The next prime is 21023441413259. The reversal of 21023441413223 is 32231414432012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21023441413223 - 2⁶ = 21023441413159 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21023441413223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21023441413523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511720706611 + 10511720706612.

It is an arithmetic number, because the mean of its divisors is an integer number (10511720706612).

Almost surely, 2^{21023441413223} is an apocalyptic number.

21023441413223 is a deficient number, since it is larger than the sum of its proper divisors (1).

21023441413223 is an equidigital number, since it uses as much as digits as its factorization.

21023441413223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 21023441413223 its reverse (32231414432012), we get a palindrome (53254855845235).

The spelling of 21023441413223 in words is "twenty-one trillion, twenty-three billion, four hundred forty-one million, four hundred thirteen thousand, two hundred twenty-three".