11221212100 has 288 divisors, whose sum is σ = 30605541120. Its totient is φ = 3483648000.

The previous prime is 11221212097. The next prime is 11221212131. The reversal of 11221212100 is 121212211.

11221212100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 95 ways as a sum of consecutive naturals, for example, 53180995 + ... + 53181205.

It is an arithmetic number, because the mean of its divisors is an integer number (106269240).

Almost surely, 2^11221212100 is an apocalyptic number.

11221212100 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 11221212100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15302770560).

11221212100 is an abundant number, since it is smaller than the sum of its proper divisors (19384329020).

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

11221212100 is a wasteful number, since it uses less digits than its factorization.

11221212100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399 (or 392 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 11221212100 its reverse (121212211), we get a palindrome (11342424311).

The spelling of 11221212100 in words is "eleven billion, two hundred twenty-one million, two hundred twelve thousand, one hundred".