11112221121100 has 72 divisors (see below), whose sum is σ = 26308575268416. Its totient is φ = 4040359560000.

The previous prime is 11112221121097. The next prime is 11112221121121. The reversal of 11112221121100 is 112112221111.

11112221121100 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 polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9444495 + ... + 10555705.

It is an arithmetic number, because the mean of its divisors is an integer number (365396878728).

Almost surely, 2^{11112221121100} is an apocalyptic number.

11112221121100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11112221121100 is an abundant number, since it is smaller than the sum of its proper divisors (15196354147316).

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

11112221121100 is a wasteful number, since it uses less digits than its factorization.

11112221121100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120327 (or 1120320 counting only the distinct ones).

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

Adding to 11112221121100 its reverse (112112221111), we get a palindrome (11224333342211).

It can be divided in two parts, 1111222 and 1121100, that added together give a palindrome (2232322).

The spelling of 11112221121100 in words is "eleven trillion, one hundred twelve billion, two hundred twenty-one million, one hundred twenty-one thousand, one hundred".