11211221002100 has 72 divisors (see below), whose sum is σ = 28155775415040. Its totient is φ = 3795190888320.

The previous prime is 11211221002097. The next prime is 11211221002123. The reversal of 11211221002100 is 120012211211.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

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, 101311979 + ... + 101422578.

It is an arithmetic number, because the mean of its divisors is an integer number (391052436320).

Almost surely, 2^{11211221002100} is an apocalyptic number.

11211221002100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11211221002100 is an abundant number, since it is smaller than the sum of its proper divisors (16944554412940).

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

11211221002100 is a wasteful number, since it uses less digits than its factorization.

11211221002100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202734657 (or 202734650 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11211221002100 its reverse (120012211211), we get a palindrome (11331233213311).

The spelling of 11211221002100 in words is "eleven trillion, two hundred eleven billion, two hundred twenty-one million, two thousand, one hundred".