22001122211100 has 144 divisors (see below), whose sum is σ = 64666034442240. Its totient is φ = 5774641632000.

The previous prime is 22001122211099. The next prime is 22001122211161. The reversal of 22001122211100 is 111222110022.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 22001122211100.

It is a congruent number.

It is an unprimeable number.

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, 2709829 + ... + 7165571.

Almost surely, 2^{22001122211100} is an apocalyptic number.

22001122211100 is a gapful number since it is divisible by the number (20) 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 22001122211100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32333017221120).

22001122211100 is an abundant number, since it is smaller than the sum of its proper divisors (42664912231140).

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

22001122211100 is a wasteful number, since it uses less digits than its factorization.

22001122211100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4456020 (or 4456013 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 22001122211100 its reverse (111222110022), we get a palindrome (22112344321122).

The spelling of 22001122211100 in words is "twenty-two trillion, one billion, one hundred twenty-two million, two hundred eleven thousand, one hundred".