11222222100 has 288 divisors, whose sum is σ = 35195247360. Its totient is φ = 2753372160.

The previous prime is 11222222083. The next prime is 11222222113. The reversal of 11222222100 is 122222211.

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

It is a self number, because there is not a number n which added to its sum of digits gives 11222222100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 28848706 + ... + 28849094.

It is an arithmetic number, because the mean of its divisors is an integer number (122205720).

Almost surely, 2^11222222100 is an apocalyptic number.

11222222100 is a gapful number since it is divisible by the number (10) 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 11222222100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17597623680).

11222222100 is an abundant number, since it is smaller than the sum of its proper divisors (23973025260).

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

11222222100 is a wasteful number, since it uses less digits than its factorization.

11222222100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579 (or 572 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 11222222100 its reverse (122222211), we get a palindrome (11344444311).

It can be divided in two parts, 1122 and 2222100, that added together give a palindrome (2223222).

The spelling of 11222222100 in words is "eleven billion, two hundred twenty-two million, two hundred twenty-two thousand, one hundred".