22011222012012 has 144 divisors (see below), whose sum is σ = 57527668703232. Its totient is φ = 7092459480960.

The previous prime is 22011222012011. The next prime is 22011222012053. The reversal of 22011222012012 is 21021022211022.

It is a happy number.

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 (22011222012011) 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 47 ways as a sum of consecutive naturals, for example, 47689462 + ... + 48148802.

It is an arithmetic number, because the mean of its divisors is an integer number (399497699328).

Almost surely, 2^{22011222012012} 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 22011222012012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28763834351616).

22011222012012 is an abundant number, since it is smaller than the sum of its proper divisors (35516446691220).

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

22011222012012 is a wasteful number, since it uses less digits than its factorization.

22011222012012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459748 (or 459743 counting only the distinct ones).

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

Adding to 22011222012012 its reverse (21021022211022), we get a palindrome (43032244223034).

The spelling of 22011222012012 in words is "twenty-two trillion, eleven billion, two hundred twenty-two million, twelve thousand, twelve".