21223023230159 has 2 divisors, whose sum is σ = 21223023230160. Its totient is φ = 21223023230158.

The previous prime is 21223023230131. The next prime is 21223023230273. The reversal of 21223023230159 is 95103232032212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21223023230159 - 2²⁰ = 21223022181583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21223023230659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611511615079 + 10611511615080.

It is an arithmetic number, because the mean of its divisors is an integer number (10611511615080).

Almost surely, 2^{21223023230159} is an apocalyptic number.

21223023230159 is a deficient number, since it is larger than the sum of its proper divisors (1).

21223023230159 is an equidigital number, since it uses as much as digits as its factorization.

21223023230159 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 35.

The spelling of 21223023230159 in words is "twenty-one trillion, two hundred twenty-three billion, twenty-three million, two hundred thirty thousand, one hundred fifty-nine".