12011112221220 has 144 divisors (see below), whose sum is σ = 42259993147008. Its totient is φ = 2704420984320.

The previous prime is 12011112221191. The next prime is 12011112221243. The reversal of 12011112221220 is 2212221111021.

12011112221220 is a `hidden beast` number, since 1 + 201 + 11 + 12 + 221 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12011112221193 and 12011112221202.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 71054601 + ... + 71223440.

It is an arithmetic number, because the mean of its divisors is an integer number (293472174632).

Almost surely, 2^{12011112221220} is an apocalyptic number.

12011112221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12011112221220 is an abundant number, since it is smaller than the sum of its proper divisors (30248880925788).

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

12011112221220 is a wasteful number, since it uses less digits than its factorization.

12011112221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142278130 (or 142278125 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12011112221220 its reverse (2212221111021), we get a palindrome (14223333332241).

The spelling of 12011112221220 in words is "twelve trillion, eleven billion, one hundred twelve million, two hundred twenty-one thousand, two hundred twenty".