22211221100 has 108 divisors (see below), whose sum is σ = 50125323024. Its totient is φ = 8541120000.

The previous prime is 22211221091. The next prime is 22211221111. The reversal of 22211221100 is 112211222.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 11934170 + ... + 11936030.

Almost surely, 2^22211221100 is an apocalyptic number.

22211221100 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 22211221100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25062661512).

22211221100 is an abundant number, since it is smaller than the sum of its proper divisors (27914101924).

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

22211221100 is a wasteful number, since it uses less digits than its factorization.

22211221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2028 (or 1980 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 22211221100 its reverse (112211222), we get a palindrome (22323432322).

It can be divided in two parts, 2221122 and 1100, that added together give a palindrome (2222222).

The spelling of 22211221100 in words is "twenty-two billion, two hundred eleven million, two hundred twenty-one thousand, one hundred".