21223023230273 has 2 divisors, whose sum is σ = 21223023230274. Its totient is φ = 21223023230272.

The previous prime is 21223023230159. The next prime is 21223023230351. The reversal of 21223023230273 is 37203232032212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20299286953729 + 923736276544 = 4505473^2 + 961112^2 .

It is a cyclic number.

It is not a de Polignac number, because 21223023230273 - 2²⁴ = 21223006453057 is a prime.

It is not a weakly prime, because it can be changed into another prime (21223023230473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611511615136 + 10611511615137.

It is an arithmetic number, because the mean of its divisors is an integer number (10611511615137).

Almost surely, 2^{21223023230273} is an apocalyptic number.

It is an amenable number.

21223023230273 is a deficient number, since it is larger than the sum of its proper divisors (1).

21223023230273 is an equidigital number, since it uses as much as digits as its factorization.

21223023230273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 32.

Adding to 21223023230273 its reverse (37203232032212), we get a palindrome (58426255262485).

The spelling of 21223023230273 in words is "twenty-one trillion, two hundred twenty-three billion, twenty-three million, two hundred thirty thousand, two hundred seventy-three".