17121205245 has 8 divisors (see below), whose sum is σ = 27393928416. Its totient is φ = 9131309456.

The previous prime is 17121205201. The next prime is 17121205253. The reversal of 17121205245 is 54250212171.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 17121205245 - 2⁹ = 17121204733 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 570706827 + ... + 570706856.

It is an arithmetic number, because the mean of its divisors is an integer number (3424241052).

Almost surely, 2^17121205245 is an apocalyptic number.

17121205245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

17121205245 is a deficient number, since it is larger than the sum of its proper divisors (10272723171).

17121205245 is a wasteful number, since it uses less digits than its factorization.

17121205245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141413691.

The product of its (nonzero) digits is 5600, while the sum is 30.

The spelling of 17121205245 in words is "seventeen billion, one hundred twenty-one million, two hundred five thousand, two hundred forty-five".