22011002100 has 288 divisors, whose sum is σ = 72651600000. Its totient is φ = 5714841600.

The previous prime is 22011002081. The next prime is 22011002107. The reversal of 22011002100 is 120011022.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22011002107) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 17622276 + ... + 17623524.

It is an arithmetic number, because the mean of its divisors is an integer number (252262500).

Almost surely, 2^22011002100 is an apocalyptic number.

22011002100 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 22011002100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36325800000).

22011002100 is an abundant number, since it is smaller than the sum of its proper divisors (50640597900).

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

22011002100 is a wasteful number, since it uses less digits than its factorization.

22011002100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1440 (or 1427 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 22011002100 its reverse (120011022), we get a palindrome (22131013122).

The spelling of 22011002100 in words is "twenty-two billion, eleven million, two thousand, one hundred".