21417422071 has 2 divisors, whose sum is σ = 21417422072. Its totient is φ = 21417422070.

The previous prime is 21417422023. The next prime is 21417422077. The reversal of 21417422071 is 17022471412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21417422071 - 2²¹ = 21415324919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21417422077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10708711035 + 10708711036.

It is an arithmetic number, because the mean of its divisors is an integer number (10708711036).

Almost surely, 2^21417422071 is an apocalyptic number.

21417422071 is a deficient number, since it is larger than the sum of its proper divisors (1).

21417422071 is an equidigital number, since it uses as much as digits as its factorization.

21417422071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6272, while the sum is 31.

Adding to 21417422071 its reverse (17022471412), we get a palindrome (38439893483).

The spelling of 21417422071 in words is "twenty-one billion, four hundred seventeen million, four hundred twenty-two thousand, seventy-one".