12121212021222 has 64 divisors (see below), whose sum is σ = 26184150720000. Its totient is φ = 3729269203968.

The previous prime is 12121212021211. The next prime is 12121212021223. The reversal of 12121212021222 is 22212021212121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121212021223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5908054 + ... + 7690742.

It is an arithmetic number, because the mean of its divisors is an integer number (409127355000).

Almost surely, 2^{12121212021222} is an apocalyptic number.

12121212021222 is an abundant number, since it is smaller than the sum of its proper divisors (14062938698778).

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

12121212021222 is a wasteful number, since it uses less digits than its factorization.

12121212021222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1784445.

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

Adding to 12121212021222 its reverse (22212021212121), we get a palindrome (34333233233343).

The spelling of 12121212021222 in words is "twelve trillion, one hundred twenty-one billion, two hundred twelve million, twenty-one thousand, two hundred twenty-two".