22122121021212 has 24 divisors (see below), whose sum is σ = 51618364970256. Its totient is φ = 7374028542208.

The previous prime is 22122121021183. The next prime is 22122121021249. The reversal of 22122121021212 is 21212012122122.

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, 9763438 + ... + 11813930.

It is an arithmetic number, because the mean of its divisors is an integer number (2150765207094).

Almost surely, 2^{22122121021212} is an apocalyptic number.

It is an amenable number.

22122121021212 is an abundant number, since it is smaller than the sum of its proper divisors (29496243949044).

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

22122121021212 is a wasteful number, since it uses less digits than its factorization.

22122121021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2949557 (or 2949555 counting only the distinct ones).

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

Adding to 22122121021212 its reverse (21212012122122), we get a palindrome (43334133143334).

The spelling of 22122121021212 in words is "twenty-two trillion, one hundred twenty-two billion, one hundred twenty-one million, twenty-one thousand, two hundred twelve".