22200011221212 has 144 divisors (see below), whose sum is σ = 63096517227744. Its totient is φ = 6522163200000.

The previous prime is 22200011221183. The next prime is 22200011221217. The reversal of 22200011221212 is 21212211000222.

It is a happy number.

22200011221212 is a `hidden beast` number, since 2 + 220 + 0 + 0 + 11 + 221 + 212 = 666.

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 (22200011221217) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1421212 + ... + 6813212.

It is an arithmetic number, because the mean of its divisors is an integer number (438170258526).

Almost surely, 2^{22200011221212} is an apocalyptic number.

22200011221212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22200011221212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31548258613872).

22200011221212 is an abundant number, since it is smaller than the sum of its proper divisors (40896506006532).

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

22200011221212 is a wasteful number, since it uses less digits than its factorization.

22200011221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5392340 (or 5392335 counting only the distinct ones).

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

Adding to 22200011221212 its reverse (21212211000222), we get a palindrome (43412222221434).

The spelling of 22200011221212 in words is "twenty-two trillion, two hundred billion, eleven million, two hundred twenty-one thousand, two hundred twelve".