22121101212 has 24 divisors (see below), whose sum is σ = 58989603456. Its totient is φ = 6320314608.

The previous prime is 22121101187. The next prime is 22121101217. The reversal of 22121101212 is 21210112122.

It is a junction number, because it is equal to n+sod(n) for n = 22121101191 and 22121101200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121101217) 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, 131673138 + ... + 131673305.

It is an arithmetic number, because the mean of its divisors is an integer number (2457900144).

Almost surely, 2^22121101212 is an apocalyptic number.

It is an amenable number.

22121101212 is an abundant number, since it is smaller than the sum of its proper divisors (36868502244).

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

22121101212 is a wasteful number, since it uses less digits than its factorization.

22121101212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263346457 (or 263346455 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 22121101212 its reverse (21210112122), we get a palindrome (43331213334).

The spelling of 22121101212 in words is "twenty-two billion, one hundred twenty-one million, one hundred one thousand, two hundred twelve".