12111002111220 has 48 divisors (see below), whose sum is σ = 34007971603200. Its totient is φ = 3220346687616.

The previous prime is 12111002111213. The next prime is 12111002111309. The reversal of 12111002111220 is 2211120011121.

It is a happy number.

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 12111002111220.

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, 289162492 + ... + 289204371.

It is an arithmetic number, because the mean of its divisors is an integer number (708499408400).

Almost surely, 2^{12111002111220} is an apocalyptic number.

12111002111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12111002111220 is an abundant number, since it is smaller than the sum of its proper divisors (21896969491980).

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

12111002111220 is a wasteful number, since it uses less digits than its factorization.

12111002111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578367224 (or 578367222 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 12111002111220 its reverse (2211120011121), we get a palindrome (14322122122341).

The spelling of 12111002111220 in words is "twelve trillion, one hundred eleven billion, two million, one hundred eleven thousand, two hundred twenty".