12011112211220 has 96 divisors (see below), whose sum is σ = 26339949619200. Its totient is φ = 4595404492800.

The previous prime is 12011112211213. The next prime is 12011112211243. The reversal of 12011112211220 is 2211221111021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 143922905 + ... + 144006335.

It is an arithmetic number, because the mean of its divisors is an integer number (274374475200).

Almost surely, 2^{12011112211220} is an apocalyptic number.

12011112211220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12011112211220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13169974809600).

12011112211220 is an abundant number, since it is smaller than the sum of its proper divisors (14328837407980).

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

12011112211220 is a wasteful number, since it uses less digits than its factorization.

12011112211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86169 (or 86167 counting only the distinct ones).

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

Adding to 12011112211220 its reverse (2211221111021), we get a palindrome (14222333322241).

The spelling of 12011112211220 in words is "twelve trillion, eleven billion, one hundred twelve million, two hundred eleven thousand, two hundred twenty".