17212111111 has 8 divisors (see below), whose sum is σ = 19342038240. Its totient is φ = 15197315232.

The previous prime is 17212111093. The next prime is 17212111129. The reversal of 17212111111 is 11111121271.

It is an interprime number because it is at equal distance from previous prime (17212111093) and next prime (17212111129).

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 17212111111 - 2²¹ = 17210013959 is a prime.

It is a Duffinian number.

17212111111 is a modest number, since divided by 111111 gives 17212 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17212111151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28782496 + ... + 28783093.

It is an arithmetic number, because the mean of its divisors is an integer number (2417754780).

Almost surely, 2^17212111111 is an apocalyptic number.

17212111111 is a deficient number, since it is larger than the sum of its proper divisors (2129927129).

17212111111 is a wasteful number, since it uses less digits than its factorization.

17212111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57565625.

The product of its digits is 28, while the sum is 19.

Adding to 17212111111 its reverse (11111121271), we get a palindrome (28323232382).

The spelling of 17212111111 in words is "seventeen billion, two hundred twelve million, one hundred eleven thousand, one hundred eleven".