21224512525793 has 2 divisors, whose sum is σ = 21224512525794. Its totient is φ = 21224512525792.

The previous prime is 21224512525483. The next prime is 21224512525907. The reversal of 21224512525793 is 39752521542212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16868204696464 + 4356307829329 = 4107092^2 + 2087177^2 .

It is a cyclic number.

It is not a de Polignac number, because 21224512525793 - 2³⁶ = 21155793049057 is a prime.

It is not a weakly prime, because it can be changed into another prime (21224512525093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10612256262896 + 10612256262897.

It is an arithmetic number, because the mean of its divisors is an integer number (10612256262897).

Almost surely, 2^{21224512525793} is an apocalyptic number.

It is an amenable number.

21224512525793 is a deficient number, since it is larger than the sum of its proper divisors (1).

21224512525793 is an equidigital number, since it uses as much as digits as its factorization.

21224512525793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024000, while the sum is 50.

The spelling of 21224512525793 in words is "twenty-one trillion, two hundred twenty-four billion, five hundred twelve million, five hundred twenty-five thousand, seven hundred ninety-three".