12011200121100 has 144 divisors (see below), whose sum is σ = 35785845670400. Its totient is φ = 3108195659520.

The previous prime is 12011200121029. The next prime is 12011200121101. The reversal of 12011200121100 is 112100211021.

It is a super-2 number, since 2×12011200121100² (a number of 27 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (12011200121101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2779341 + ... + 5634459.

Almost surely, 2^{12011200121100} is an apocalyptic number.

12011200121100 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 12011200121100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17892922835200).

12011200121100 is an abundant number, since it is smaller than the sum of its proper divisors (23774645549300).

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

12011200121100 is a wasteful number, since it uses less digits than its factorization.

12011200121100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2855552 (or 2855545 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 12011200121100 its reverse (112100211021), we get a palindrome (12123300332121).

The spelling of 12011200121100 in words is "twelve trillion, eleven billion, two hundred million, one hundred twenty-one thousand, one hundred".