12221202111212 has 48 divisors (see below), whose sum is σ = 23837789485440. Its totient is φ = 5448285649152.

The previous prime is 12221202111199. The next prime is 12221202111277. The reversal of 12221202111212 is 21211120212221.

It is a super-2 number, since 2×12221202111212² (a number of 27 digits) contains 22 as substring.

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, 45036923 + ... + 45307469.

It is an arithmetic number, because the mean of its divisors is an integer number (496620614280).

Almost surely, 2^{12221202111212} is an apocalyptic number.

It is an amenable number.

12221202111212 is a deficient number, since it is larger than the sum of its proper divisors (11616587374228).

12221202111212 is a wasteful number, since it uses less digits than its factorization.

12221202111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305550 (or 305548 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 12221202111212 its reverse (21211120212221), we get a palindrome (33432322323433).

The spelling of 12221202111212 in words is "twelve trillion, two hundred twenty-one billion, two hundred two million, one hundred eleven thousand, two hundred twelve".