12102021122220 has 144 divisors (see below), whose sum is σ = 37976959762560. Its totient is φ = 3115787125248.

The previous prime is 12102021122201. The next prime is 12102021122251. The reversal of 12102021122220 is 2222112020121.

It is a happy number.

12102021122220 is a `hidden beast` number, since 1 + 210 + 2 + 0 + 211 + 22 + 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 = 12102021122193 and 12102021122202.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 184948429 + ... + 185013851.

It is an arithmetic number, because the mean of its divisors is an integer number (263728887240).

Almost surely, 2^{12102021122220} is an apocalyptic number.

12102021122220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12102021122220 is an abundant number, since it is smaller than the sum of its proper divisors (25874938640340).

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

12102021122220 is a wasteful number, since it uses less digits than its factorization.

12102021122220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100904 (or 100899 counting only the distinct ones).

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

Adding to 12102021122220 its reverse (2222112020121), we get a palindrome (14324133142341).

The spelling of 12102021122220 in words is "twelve trillion, one hundred two billion, twenty-one million, one hundred twenty-two thousand, two hundred twenty".