12011221012120 has 64 divisors (see below), whose sum is σ = 29482689808800. Its totient is φ = 4367627566080.

The previous prime is 12011221012111. The next prime is 12011221012127. The reversal of 12011221012120 is 2121012211021.

It is a junction number, because it is equal to n+sod(n) for n = 12011221012094 and 12011221012103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011221012127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23626852 + ... + 24129868.

Almost surely, 2^{12011221012120} is an apocalyptic number.

12011221012120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12011221012120 is an abundant number, since it is smaller than the sum of its proper divisors (17471468796680).

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

12011221012120 is a wasteful number, since it uses less digits than its factorization.

12011221012120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557308 (or 557304 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12011221012120 its reverse (2121012211021), we get a palindrome (14132233223141).

The spelling of 12011221012120 in words is "twelve trillion, eleven billion, two hundred twenty-one million, twelve thousand, one hundred twenty".