22211113212 has 72 divisors (see below), whose sum is σ = 57203480880. Its totient is φ = 7265395200.

The previous prime is 22211113201. The next prime is 22211113247. The reversal of 22211113212 is 21231111222.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 383839 + ... + 437897.

It is an arithmetic number, because the mean of its divisors is an integer number (794492790).

Almost surely, 2^22211113212 is an apocalyptic number.

It is an amenable number.

22211113212 is an abundant number, since it is smaller than the sum of its proper divisors (34992367668).

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

22211113212 is a wasteful number, since it uses less digits than its factorization.

22211113212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54283 (or 54278 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

Adding to 22211113212 its reverse (21231111222), we get a palindrome (43442224434).

The spelling of 22211113212 in words is "twenty-two billion, two hundred eleven million, one hundred thirteen thousand, two hundred twelve".