22121212112212 has 24 divisors (see below), whose sum is σ = 38723950897632. Its totient is φ = 11057226516000.

The previous prime is 22121212112189. The next prime is 22121212112257. The reversal of 22121212112212 is 21221121212122.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 311965962 + ... + 312036862.

It is an arithmetic number, because the mean of its divisors is an integer number (1613497954068).

Almost surely, 2^{22121212112212} is an apocalyptic number.

It is an amenable number.

22121212112212 is a deficient number, since it is larger than the sum of its proper divisors (16602738785420).

22121212112212 is a wasteful number, since it uses less digits than its factorization.

22121212112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93639 (or 93637 counting only the distinct ones).

The product of its digits is 256, while the sum is 22.

Adding to 22121212112212 its reverse (21221121212122), we get a palindrome (43342333324334).

The spelling of 22121212112212 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred twelve million, one hundred twelve thousand, two hundred twelve".