11111101220100 has 144 divisors (see below), whose sum is σ = 36898395101568. Its totient is φ = 2528780252160.

The previous prime is 11111101220071. The next prime is 11111101220111. The reversal of 11111101220100 is 102210111111.

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

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 47 ways as a sum of consecutive naturals, for example, 10864779 + ... + 11843378.

It is an arithmetic number, because the mean of its divisors is an integer number (256238854872).

Almost surely, 2^{11111101220100} is an apocalyptic number.

11111101220100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11111101220100 is an abundant number, since it is smaller than the sum of its proper divisors (25787293881468).

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

11111101220100 is a wasteful number, since it uses less digits than its factorization.

11111101220100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22708414 (or 22708407 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 11111101220100 its reverse (102210111111), we get a palindrome (11213311331211).

The spelling of 11111101220100 in words is "eleven trillion, one hundred eleven billion, one hundred one million, two hundred twenty thousand, one hundred".