11221112100 has 288 divisors, whose sum is σ = 37641340800. Its totient is φ = 2554675200.

The previous prime is 11221112087. The next prime is 11221112197. The reversal of 11221112100 is 121112211.

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 3539316 + ... + 3542484.

It is an arithmetic number, because the mean of its divisors is an integer number (130699100).

Almost surely, 2^11221112100 is an apocalyptic number.

11221112100 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 11221112100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18820670400).

11221112100 is an abundant number, since it is smaller than the sum of its proper divisors (26420228700).

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

11221112100 is a wasteful number, since it uses less digits than its factorization.

11221112100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3263 (or 3256 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11221112100 its reverse (121112211), we get a palindrome (11342224311).

It can be divided in two parts, 1122111 and 2100, that added together give a palindrome (1124211).

The spelling of 11221112100 in words is "eleven billion, two hundred twenty-one million, one hundred twelve thousand, one hundred".