21238080408241 has 2 divisors, whose sum is σ = 21238080408242. Its totient is φ = 21238080408240.

The previous prime is 21238080408221. The next prime is 21238080408263. The reversal of 21238080408241 is 14280408083212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20261746703025 + 976333705216 = 4501305^2 + 988096^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21238080408241 is a prime.

It is not a weakly prime, because it can be changed into another prime (21238080408221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10619040204120 + 10619040204121.

It is an arithmetic number, because the mean of its divisors is an integer number (10619040204121).

Almost surely, 2^{21238080408241} is an apocalyptic number.

It is an amenable number.

21238080408241 is a deficient number, since it is larger than the sum of its proper divisors (1).

21238080408241 is an equidigital number, since it uses as much as digits as its factorization.

21238080408241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 196608, while the sum is 43.

The spelling of 21238080408241 in words is "twenty-one trillion, two hundred thirty-eight billion, eighty million, four hundred eight thousand, two hundred forty-one".