17214384721 has 2 divisors, whose sum is σ = 17214384722. Its totient is φ = 17214384720.

The previous prime is 17214384701. The next prime is 17214384743. The reversal of 17214384721 is 12748341271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16961415696 + 252969025 = 130236^2 + 15905^2 .

It is an emirp because it is prime and its reverse (12748341271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 17214384721 - 2¹¹ = 17214382673 is a prime.

It is not a weakly prime, because it can be changed into another prime (17214384701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8607192360 + 8607192361.

It is an arithmetic number, because the mean of its divisors is an integer number (8607192361).

Almost surely, 2^17214384721 is an apocalyptic number.

It is an amenable number.

17214384721 is a deficient number, since it is larger than the sum of its proper divisors (1).

17214384721 is an equidigital number, since it uses as much as digits as its factorization.

17214384721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75264, while the sum is 40.

The spelling of 17214384721 in words is "seventeen billion, two hundred fourteen million, three hundred eighty-four thousand, seven hundred twenty-one".