22211110201212 has 168 divisors, whose sum is σ = 59154874471056. Its totient is φ = 7292770619904.

The previous prime is 22211110201211. The next prime is 22211110201253. The reversal of 22211110201212 is 21210201111222.

It is a super-2 number, since 2×22211110201212² (a number of 27 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22211110201211) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 81427278 + ... + 81699594.

It is an arithmetic number, because the mean of its divisors is an integer number (352112348042).

Almost surely, 2^{22211110201212} 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 22211110201212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29577437235528).

22211110201212 is an abundant number, since it is smaller than the sum of its proper divisors (36943764269844).

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

22211110201212 is a wasteful number, since it uses less digits than its factorization.

22211110201212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272759 (or 272742 counting only the distinct ones).

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

Adding to 22211110201212 its reverse (21210201111222), we get a palindrome (43421311312434).

The spelling of 22211110201212 in words is "twenty-two trillion, two hundred eleven billion, one hundred ten million, two hundred one thousand, two hundred twelve".