22121121121212 has 24 divisors (see below), whose sum is σ = 51695726656896. Its totient is φ = 7362310272688.

The previous prime is 22121121121201. The next prime is 22121121121237. The reversal of 22121121121212 is 21212112112122.

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, 1424587878 + ... + 1424603405.

It is an arithmetic number, because the mean of its divisors is an integer number (2153988610704).

Almost surely, 2^{22121121121212} is an apocalyptic number.

It is an amenable number.

22121121121212 is an abundant number, since it is smaller than the sum of its proper divisors (29574605535684).

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

22121121121212 is a wasteful number, since it uses less digits than its factorization.

22121121121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2849191937 (or 2849191935 counting only the distinct ones).

The product of its digits is 128, while the sum is 21.

Adding to 22121121121212 its reverse (21212112112122), we get a palindrome (43333233233334).

The spelling of 22121121121212 in words is "twenty-two trillion, one hundred twenty-one billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred twelve".