12012021122220 has 144 divisors (see below), whose sum is σ = 41645411877888. Its totient is φ = 2745358323840.

The previous prime is 12012021122191. The next prime is 12012021122263. The reversal of 12012021122220 is 2222112021021.

It is a happy number.

12012021122220 is a `hidden beast` number, since 120 + 1 + 202 + 1 + 122 + 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 = 12012021122193 and 12012021122202.

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 47 ways as a sum of consecutive naturals, for example, 13799305 + ... + 14643935.

It is an arithmetic number, because the mean of its divisors is an integer number (289204249152).

Almost surely, 2^{12012021122220} is an apocalyptic number.

12012021122220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12012021122220 is an abundant number, since it is smaller than the sum of its proper divisors (29633390755668).

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

12012021122220 is a wasteful number, since it uses less digits than its factorization.

12012021122220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855940 (or 855935 counting only the distinct ones).

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

Adding to 12012021122220 its reverse (2222112021021), we get a palindrome (14234133143241).

The spelling of 12012021122220 in words is "twelve trillion, twelve billion, twenty-one million, one hundred twenty-two thousand, two hundred twenty".