12011220221220 has 216 divisors, whose sum is σ = 41788517254848. Its totient is φ = 2785210369920.

The previous prime is 12011220221219. The next prime is 12011220221279. The reversal of 12011220221220 is 2212202211021.

It is a happy number.

12011220221220 is a `hidden beast` number, since 1 + 2 + 0 + 1 + 1 + 220 + 221 + 220 = 666.

It is a super-2 number, since 2×12011220221220² (a number of 27 digits) contains 22 as substring.

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 = 12011220221193 and 12011220221202.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 11487742 + ... + 12489621.

Almost surely, 2^{12011220221220} is an apocalyptic number.

12011220221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12011220221220 is an abundant number, since it is smaller than the sum of its proper divisors (29777297033628).

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

12011220221220 is a wasteful number, since it uses less digits than its factorization.

12011220221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23977423 (or 23977407 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12011220221220 its reverse (2212202211021), we get a palindrome (14223422432241).

The spelling of 12011220221220 in words is "twelve trillion, eleven billion, two hundred twenty million, two hundred twenty-one thousand, two hundred twenty".