21670338240601 has 2 divisors, whose sum is σ = 21670338240602. Its totient is φ = 21670338240600.

The previous prime is 21670338240599. The next prime is 21670338240641. The reversal of 21670338240601 is 10604283307612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20357927424576 + 1312410816025 = 4511976^2 + 1145605^2 .

It is a cyclic number.

It is not a de Polignac number, because 21670338240601 - 2¹ = 21670338240599 is a prime.

Together with 21670338240599, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21670338240641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10835169120300 + 10835169120301.

It is an arithmetic number, because the mean of its divisors is an integer number (10835169120301).

Almost surely, 2^{21670338240601} is an apocalyptic number.

It is an amenable number.

21670338240601 is a deficient number, since it is larger than the sum of its proper divisors (1).

21670338240601 is an equidigital number, since it uses as much as digits as its factorization.

21670338240601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 43.

The spelling of 21670338240601 in words is "twenty-one trillion, six hundred seventy billion, three hundred thirty-eight million, two hundred forty thousand, six hundred one".