17129941221 has 8 divisors (see below), whose sum is σ = 23129034880. Its totient is φ = 11275404192.

The previous prime is 17129941181. The next prime is 17129941237. The reversal of 17129941221 is 12214992171.

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

It is a de Polignac number, because none of the positive numbers 2^k-17129941221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 17129941221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17129941921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36138880 + ... + 36139353.

It is an arithmetic number, because the mean of its divisors is an integer number (2891129360).

Almost surely, 2^17129941221 is an apocalyptic number.

It is an amenable number.

17129941221 is a deficient number, since it is larger than the sum of its proper divisors (5999093659).

17129941221 is an equidigital number, since it uses as much as digits as its factorization.

17129941221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72278315.

The product of its digits is 18144, while the sum is 39.

The spelling of 17129941221 in words is "seventeen billion, one hundred twenty-nine million, nine hundred forty-one thousand, two hundred twenty-one".