12111016605 has 16 divisors (see below), whose sum is σ = 20002712064. Its totient is φ = 6250847040.

The previous prime is 12111016573. The next prime is 12111016661. The reversal of 12111016605 is 50661011121.

It is not a de Polignac number, because 12111016605 - 2⁵ = 12111016573 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13022134 + ... + 13023063.

It is an arithmetic number, because the mean of its divisors is an integer number (1250169504).

Almost surely, 2^12111016605 is an apocalyptic number.

12111016605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12111016605 is a deficient number, since it is larger than the sum of its proper divisors (7891695459).

12111016605 is a wasteful number, since it uses less digits than its factorization.

12111016605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26045236.

The product of its (nonzero) digits is 360, while the sum is 24.

Adding to 12111016605 its reverse (50661011121), we get a palindrome (62772027726).

The spelling of 12111016605 in words is "twelve billion, one hundred eleven million, sixteen thousand, six hundred five".