11121122201100 has 144 divisors (see below), whose sum is σ = 33749889535488. Its totient is φ = 2824087023360.

The previous prime is 11121122201099. The next prime is 11121122201141. The reversal of 11121122201100 is 110222112111.

It is a happy number.

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 11121122201100.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10136842 + ... + 11180241.

Almost surely, 2^{11121122201100} is an apocalyptic number.

11121122201100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11121122201100 is an abundant number, since it is smaller than the sum of its proper divisors (22628767334388).

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

11121122201100 is a wasteful number, since it uses less digits than its factorization.

11121122201100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21317184 (or 21317177 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 11121122201100 its reverse (110222112111), we get a palindrome (11231344313211).

It can be divided in two parts, 11121 and 122201100, that added together give a palindrome (122212221).

The spelling of 11121122201100 in words is "eleven trillion, one hundred twenty-one billion, one hundred twenty-two million, two hundred one thousand, one hundred".