12221121021112 has 32 divisors (see below), whose sum is σ = 24121454025600. Its totient is φ = 5788755159264.

The previous prime is 12221121021107. The next prime is 12221121021119. The reversal of 12221121021112 is 21112012112221.

It is a happy number.

It is a super-2 number, since 2×12221121021112² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 12221121021112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221121021119) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3165373 + ... + 5870419.

It is an arithmetic number, because the mean of its divisors is an integer number (753795438300).

Almost surely, 2^{12221121021112} is an apocalyptic number.

It is an amenable number.

12221121021112 is a deficient number, since it is larger than the sum of its proper divisors (11900333004488).

12221121021112 is a wasteful number, since it uses less digits than its factorization.

12221121021112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2734795 (or 2734791 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 12221121021112 its reverse (21112012112221), we get a palindrome (33333133133333).

The spelling of 12221121021112 in words is "twelve trillion, two hundred twenty-one billion, one hundred twenty-one million, twenty-one thousand, one hundred twelve".