12111112120100 has 144 divisors (see below), whose sum is σ = 30228265267200. Its totient is φ = 4125797596800.

The previous prime is 12111112120087. The next prime is 12111112120189. The reversal of 12111112120100 is 102121111121.

It is a super-4 number, since 4×12111112120100⁴ (a number of 53 digits) contains 4444 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 101211305 + ... + 101330895.

It is an arithmetic number, because the mean of its divisors is an integer number (209918508800).

Almost surely, 2^{12111112120100} is an apocalyptic number.

12111112120100 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 12111112120100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15114132633600).

12111112120100 is an abundant number, since it is smaller than the sum of its proper divisors (18117153147100).

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

12111112120100 is a wasteful number, since it uses less digits than its factorization.

12111112120100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120538 (or 120531 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 12111112120100 its reverse (102121111121), we get a palindrome (12213233231221).

The spelling of 12111112120100 in words is "twelve trillion, one hundred eleven billion, one hundred twelve million, one hundred twenty thousand, one hundred".