11100121212100 has 144 divisors (see below), whose sum is σ = 25645792244800. Its totient is φ = 4158221598720.

The previous prime is 11100121212053. The next prime is 11100121212121. The reversal of 11100121212100 is 121212100111.

It is a happy number.

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, 162702796 + ... + 162771004.

Almost surely, 2^{11100121212100} is an apocalyptic number.

11100121212100 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 11100121212100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12822896122400).

11100121212100 is an abundant number, since it is smaller than the sum of its proper divisors (14545671032700).

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

11100121212100 is a wasteful number, since it uses less digits than its factorization.

11100121212100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69222 (or 69215 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11100121212100 its reverse (121212100111), we get a palindrome (11221333312211).

The spelling of 11100121212100 in words is "eleven trillion, one hundred billion, one hundred twenty-one million, two hundred twelve thousand, one hundred".