12111122011220 has 12 divisors (see below), whose sum is σ = 25433356223604. Its totient is φ = 4844448804480.

The previous prime is 12111122011199. The next prime is 12111122011237. The reversal of 12111122011220 is 2211022111121.

It can be written as a sum of positive squares in 2 ways, for example, as 2288551737616 + 9822570273604 = 1512796^2 + 3134098^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 302778050261 + ... + 302778050300.

It is an arithmetic number, because the mean of its divisors is an integer number (2119446351967).

Almost surely, 2^{12111122011220} is an apocalyptic number.

12111122011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12111122011220 is an abundant number, since it is smaller than the sum of its proper divisors (13322234212384).

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

12111122011220 is a wasteful number, since it uses less digits than its factorization.

12111122011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605556100570 (or 605556100568 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 12111122011220 its reverse (2211022111121), we get a palindrome (14322144122341).

Subtracting from 12111122011220 its reverse (2211022111121), we obtain a palindrome (9900099900099).

The spelling of 12111122011220 in words is "twelve trillion, one hundred eleven billion, one hundred twenty-two million, eleven thousand, two hundred twenty".