12111209011 has 8 divisors (see below), whose sum is σ = 13436164800. Its totient is φ = 10823576040.

The previous prime is 12111209009. The next prime is 12111209027. The reversal of 12111209011 is 11090211121.

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 12111209011 - 2¹ = 12111209009 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 12111209011.

It is not an unprimeable number, because it can be changed into a prime (12111209041) 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, 9330021 + ... + 9331318.

It is an arithmetic number, because the mean of its divisors is an integer number (1679520600).

Almost surely, 2^12111209011 is an apocalyptic number.

12111209011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12111209011 is a deficient number, since it is larger than the sum of its proper divisors (1324955789).

12111209011 is a wasteful number, since it uses less digits than its factorization.

12111209011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18661409.

The product of its (nonzero) digits is 36, while the sum is 19.

It can be divided in two parts, 12111 and 209011, that added together give a palindrome (221122).

The spelling of 12111209011 in words is "twelve billion, one hundred eleven million, two hundred nine thousand, eleven".