12221212021122 has 16 divisors (see below), whose sum is σ = 26322610507200. Its totient is φ = 3760372929552.

The previous prime is 12221212021121. The next prime is 12221212021147. The reversal of 12221212021122 is 22112021212221.

It is not an unprimeable number, because it can be changed into a prime (12221212021121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78341102622 + ... + 78341102777.

It is an arithmetic number, because the mean of its divisors is an integer number (1645163156700).

Almost surely, 2^{12221212021122} is an apocalyptic number.

12221212021122 is an abundant number, since it is smaller than the sum of its proper divisors (14101398486078).

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

12221212021122 is a wasteful number, since it uses less digits than its factorization.

12221212021122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156682205417.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 12221212021122 its reverse (22112021212221), we get a palindrome (34333233233343).

The spelling of 12221212021122 in words is "twelve trillion, two hundred twenty-one billion, two hundred twelve million, twenty-one thousand, one hundred twenty-two".