12111041220 has 48 divisors (see below), whose sum is σ = 33927985728. Its totient is φ = 3227985280.

The previous prime is 12111041191. The next prime is 12111041231. The reversal of 12111041220 is 2214011121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 12111041220.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71830 + ... + 171410.

It is an arithmetic number, because the mean of its divisors is an integer number (706833036).

Almost surely, 2^12111041220 is an apocalyptic number.

12111041220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12111041220 is an abundant number, since it is smaller than the sum of its proper divisors (21816944508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12111041220 is a wasteful number, since it uses less digits than its factorization.

12111041220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101620 (or 101618 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12111041220 its reverse (2214011121), we get a palindrome (14325052341).

The spelling of 12111041220 in words is "twelve billion, one hundred eleven million, forty-one thousand, two hundred twenty".