22122543212 has 48 divisors (see below), whose sum is σ = 48563596032. Its totient is φ = 8566274880.

The previous prime is 22122543211. The next prime is 22122543221. The reversal of 22122543212 is 21234522122.

It is not an unprimeable number, because it can be changed into a prime (22122543211) 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 15 ways as a sum of consecutive naturals, for example, 170123 + ... + 270530.

It is an arithmetic number, because the mean of its divisors is an integer number (1011741584).

Almost surely, 2^22122543212 is an apocalyptic number.

22122543212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22122543212 is an abundant number, since it is smaller than the sum of its proper divisors (26441052820).

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

22122543212 is a wasteful number, since it uses less digits than its factorization.

22122543212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440838 (or 440836 counting only the distinct ones).

The product of its digits is 3840, while the sum is 26.

The spelling of 22122543212 in words is "twenty-two billion, one hundred twenty-two million, five hundred forty-three thousand, two hundred twelve".