17121406187 has 2 divisors, whose sum is σ = 17121406188. Its totient is φ = 17121406186.

The previous prime is 17121406121. The next prime is 17121406199. The reversal of 17121406187 is 78160412171.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 17121406187 - 2²⁸ = 16852970731 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 17121406187.

It is not a weakly prime, because it can be changed into another prime (17121406387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8560703093 + 8560703094.

It is an arithmetic number, because the mean of its divisors is an integer number (8560703094).

Almost surely, 2^17121406187 is an apocalyptic number.

17121406187 is a deficient number, since it is larger than the sum of its proper divisors (1).

17121406187 is an equidigital number, since it uses as much as digits as its factorization.

17121406187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18816, while the sum is 38.

The spelling of 17121406187 in words is "seventeen billion, one hundred twenty-one million, four hundred six thousand, one hundred eighty-seven".