22121011121212 has 12 divisors (see below), whose sum is σ = 38712171183840. Its totient is φ = 11060390782976.

The previous prime is 22121011121203. The next prime is 22121011121213. The reversal of 22121011121212 is 21212111012122.

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 22121011121212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121011121213) 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 3 ways as a sum of consecutive naturals, for example, 28260037 + ... + 29032252.

It is an arithmetic number, because the mean of its divisors is an integer number (3226014265320).

Almost surely, 2^{22121011121212} is an apocalyptic number.

It is an amenable number.

22121011121212 is a deficient number, since it is larger than the sum of its proper divisors (16591160062628).

22121011121212 is a wasteful number, since it uses less digits than its factorization.

22121011121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57388820 (or 57388818 counting only the distinct ones).

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

Adding to 22121011121212 its reverse (21212111012122), we get a palindrome (43333122133334).

The spelling of 22121011121212 in words is "twenty-two trillion, one hundred twenty-one billion, eleven million, one hundred twenty-one thousand, two hundred twelve".