20121220112022 has 12 divisors (see below), whose sum is σ = 43595976909420. Its totient is φ = 6707073370668.

The previous prime is 20121220111939. The next prime is 20121220112087. The reversal of 20121220112022 is 22021102212102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1117845561779 = 20121220112022 / (2 + 0 + 1 + 2 + 1 + 2 + 2 + 0 + 1 + 1 + 2 + 0 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 20121220111986 and 20121220112004.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 558922780872 + ... + 558922780907.

It is an arithmetic number, because the mean of its divisors is an integer number (3632998075785).

Almost surely, 2^{20121220112022} is an apocalyptic number.

20121220112022 is an abundant number, since it is smaller than the sum of its proper divisors (23474756797398).

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

20121220112022 is a wasteful number, since it uses less digits than its factorization.

20121220112022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117845561787 (or 1117845561784 counting only the distinct ones).

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

Adding to 20121220112022 its reverse (22021102212102), we get a palindrome (42142322324124).

The spelling of 20121220112022 in words is "twenty trillion, one hundred twenty-one billion, two hundred twenty million, one hundred twelve thousand, twenty-two".