12221121011212 has 48 divisors (see below), whose sum is σ = 22339366560000. Its totient is φ = 5838984169920.

The previous prime is 12221121011207. The next prime is 12221121011273. The reversal of 12221121011212 is 21211012112221.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12221121011212.

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 15 ways as a sum of consecutive naturals, for example, 469650762 + ... + 469676782.

It is an arithmetic number, because the mean of its divisors is an integer number (465403470000).

Almost surely, 2^{12221121011212} is an apocalyptic number.

It is an amenable number.

12221121011212 is a deficient number, since it is larger than the sum of its proper divisors (10118245548788).

12221121011212 is a wasteful number, since it uses less digits than its factorization.

12221121011212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31006 (or 31004 counting only the distinct ones).

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

Adding to 12221121011212 its reverse (21211012112221), we get a palindrome (33432133123433).

The spelling of 12221121011212 in words is "twelve trillion, two hundred twenty-one billion, one hundred twenty-one million, eleven thousand, two hundred twelve".