17421212161 has 8 divisors (see below), whose sum is σ = 18226630080. Its totient is φ = 16619792112.

The previous prime is 17421212143. The next prime is 17421212189. The reversal of 17421212161 is 16121212471.

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 17421212161 - 2¹⁷ = 17421081089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17421212131) 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, 990550 + ... + 1007983.

It is an arithmetic number, because the mean of its divisors is an integer number (2278328760).

Almost surely, 2^17421212161 is an apocalyptic number.

It is an amenable number.

17421212161 is a deficient number, since it is larger than the sum of its proper divisors (805417919).

17421212161 is a wasteful number, since it uses less digits than its factorization.

17421212161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1998935.

The product of its digits is 1344, while the sum is 28.

The spelling of 17421212161 in words is "seventeen billion, four hundred twenty-one million, two hundred twelve thousand, one hundred sixty-one".