12121200111222 has 96 divisors (see below), whose sum is σ = 27307245332640. Its totient is φ = 3882689925120.

The previous prime is 12121200111187. The next prime is 12121200111227. The reversal of 12121200111222 is 22211100212121.

12121200111222 is a `hidden beast` number, since 1 + 212 + 120 + 0 + 111 + 222 = 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 = 12121200111195 and 12121200111204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121200111227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17527572 + ... + 18205992.

It is an arithmetic number, because the mean of its divisors is an integer number (284450472215).

Almost surely, 2^{12121200111222} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12121200111222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13653622666320).

12121200111222 is an abundant number, since it is smaller than the sum of its proper divisors (15186045221418).

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

12121200111222 is a wasteful number, since it uses less digits than its factorization.

12121200111222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678798 (or 678795 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12121200111222 its reverse (22211100212121), we get a palindrome (34332300323343).

The spelling of 12121200111222 in words is "twelve trillion, one hundred twenty-one billion, two hundred million, one hundred eleven thousand, two hundred twenty-two".