21221225023223 has 2 divisors, whose sum is σ = 21221225023224. Its totient is φ = 21221225023222.

The previous prime is 21221225023199. The next prime is 21221225023283. The reversal of 21221225023223 is 32232052212212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21221225023223 - 2⁸ = 21221225022967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21221225023283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610612511611 + 10610612511612.

It is an arithmetic number, because the mean of its divisors is an integer number (10610612511612).

Almost surely, 2^{21221225023223} is an apocalyptic number.

21221225023223 is a deficient number, since it is larger than the sum of its proper divisors (1).

21221225023223 is an equidigital number, since it uses as much as digits as its factorization.

21221225023223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 21221225023223 its reverse (32232052212212), we get a palindrome (53453277235435).

The spelling of 21221225023223 in words is "twenty-one trillion, two hundred twenty-one billion, two hundred twenty-five million, twenty-three thousand, two hundred twenty-three".