22100222011212 has 168 divisors, whose sum is σ = 58229436932240. Its totient is φ = 7335945429120.

The previous prime is 22100222011193. The next prime is 22100222011271. The reversal of 22100222011212 is 21211022200122.

It is a happy number.

22100222011212 is a `hidden beast` number, since 221 + 0 + 0 + 2 + 220 + 11 + 212 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 730498278 + ... + 730528530.

Almost surely, 2^{22100222011212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22100222011212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29114718466120).

22100222011212 is an abundant number, since it is smaller than the sum of its proper divisors (36129214921028).

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

22100222011212 is a wasteful number, since it uses less digits than its factorization.

22100222011212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31315 (or 31298 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 22100222011212 its reverse (21211022200122), we get a palindrome (43311244211334).

The spelling of 22100222011212 in words is "twenty-two trillion, one hundred billion, two hundred twenty-two million, eleven thousand, two hundred twelve".