21224404102459 has 2 divisors, whose sum is σ = 21224404102460. Its totient is φ = 21224404102458.

The previous prime is 21224404102361. The next prime is 21224404102477. The reversal of 21224404102459 is 95420140442212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21224404102459 - 2¹¹ = 21224404100411 is a prime.

It is not a weakly prime, because it can be changed into another prime (21224404102159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10612202051229 + 10612202051230.

It is an arithmetic number, because the mean of its divisors is an integer number (10612202051230).

Almost surely, 2^{21224404102459} is an apocalyptic number.

21224404102459 is a deficient number, since it is larger than the sum of its proper divisors (1).

21224404102459 is an equidigital number, since it uses as much as digits as its factorization.

21224404102459 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 184320, while the sum is 40.

The spelling of 21224404102459 in words is "twenty-one trillion, two hundred twenty-four billion, four hundred four million, one hundred two thousand, four hundred fifty-nine".