12012221001220 has 96 divisors (see below), whose sum is σ = 27556265318400. Its totient is φ = 4362152995200.

The previous prime is 12012221001211. The next prime is 12012221001223. The reversal of 12012221001220 is 2210012221021.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12012221001194 and 12012221001203.

It is not an unprimeable number, because it can be changed into a prime (12012221001223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1406743711 + ... + 1406752249.

It is an arithmetic number, because the mean of its divisors is an integer number (287044430400).

Almost surely, 2^{12012221001220} is an apocalyptic number.

12012221001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12012221001220 is an abundant number, since it is smaller than the sum of its proper divisors (15544044317180).

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

12012221001220 is a wasteful number, since it uses less digits than its factorization.

12012221001220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16489 (or 16487 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12012221001220 its reverse (2210012221021), we get a palindrome (14222233222241).

The spelling of 12012221001220 in words is "twelve trillion, twelve billion, two hundred twenty-one million, one thousand, two hundred twenty".