22111200211212 has 192 divisors, whose sum is σ = 65868713164800. Its totient is φ = 6283356805440.

The previous prime is 22111200211211. The next prime is 22111200211223. The reversal of 22111200211212 is 21211200211122.

22111200211212 is a `hidden beast` number, since 221 + 1 + 1 + 20 + 0 + 211 + 212 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (22111200211211) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1362945733 + ... + 1362961955.

It is an arithmetic number, because the mean of its divisors is an integer number (343066214400).

Almost surely, 2^{22111200211212} 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 22111200211212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32934356582400).

22111200211212 is an abundant number, since it is smaller than the sum of its proper divisors (43757512953588).

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

22111200211212 is a wasteful number, since it uses less digits than its factorization.

22111200211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25873 (or 25865 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 22111200211212 its reverse (21211200211122), we get a palindrome (43322400422334).

The spelling of 22111200211212 in words is "twenty-two trillion, one hundred eleven billion, two hundred million, two hundred eleven thousand, two hundred twelve".