21717422107 has 2 divisors, whose sum is σ = 21717422108. Its totient is φ = 21717422106.

The previous prime is 21717422087. The next prime is 21717422137. The reversal of 21717422107 is 70122471712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21717422107 - 2¹¹ = 21717420059 is a prime.

It is a super-3 number, since 3×21717422107³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (21717422137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10858711053 + 10858711054.

It is an arithmetic number, because the mean of its divisors is an integer number (10858711054).

Almost surely, 2^21717422107 is an apocalyptic number.

21717422107 is a deficient number, since it is larger than the sum of its proper divisors (1).

21717422107 is an equidigital number, since it uses as much as digits as its factorization.

21717422107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10976, while the sum is 34.

Adding to 21717422107 its reverse (70122471712), we get a palindrome (91839893819).

The spelling of 21717422107 in words is "twenty-one billion, seven hundred seventeen million, four hundred twenty-two thousand, one hundred seven".