20122221200212 has 48 divisors (see below), whose sum is σ = 36689730863184. Its totient is φ = 9648059904000.

The previous prime is 20122221200197. The next prime is 20122221200311. The reversal of 20122221200212 is 21200212222102.

It can be written as a sum of positive squares in 8 ways, for example, as 537294864016 + 19584926336196 = 733004^2 + 4425486^2 .

It is a super-2 number, since 2×20122221200212² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20122221200212.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 13633912 + ... + 15037552.

It is an arithmetic number, because the mean of its divisors is an integer number (764369392983).

Almost surely, 2^{20122221200212} is an apocalyptic number.

It is an amenable number.

20122221200212 is a deficient number, since it is larger than the sum of its proper divisors (16567509662972).

20122221200212 is a wasteful number, since it uses less digits than its factorization.

20122221200212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1405180 (or 1405178 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 20122221200212 its reverse (21200212222102), we get a palindrome (41322433422314).

The spelling of 20122221200212 in words is "twenty trillion, one hundred twenty-two billion, two hundred twenty-one million, two hundred thousand, two hundred twelve".