21422399207771 has 2 divisors, whose sum is σ = 21422399207772. Its totient is φ = 21422399207770.

The previous prime is 21422399207767. The next prime is 21422399207789. The reversal of 21422399207771 is 17770299322412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21422399207771 - 2² = 21422399207767 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21422399207711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10711199603885 + 10711199603886.

It is an arithmetic number, because the mean of its divisors is an integer number (10711199603886).

Almost surely, 2^{21422399207771} is an apocalyptic number.

21422399207771 is a deficient number, since it is larger than the sum of its proper divisors (1).

21422399207771 is an equidigital number, since it uses as much as digits as its factorization.

21422399207771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5334336, while the sum is 56.

The spelling of 21422399207771 in words is "twenty-one trillion, four hundred twenty-two billion, three hundred ninety-nine million, two hundred seven thousand, seven hundred seventy-one".