12001211001100 has 144 divisors (see below), whose sum is σ = 28156351815648. Its totient is φ = 4423677788160.

The previous prime is 12001211001079. The next prime is 12001211001217. The reversal of 12001211001100 is 110011210021.

It is a Harshad number since it is a multiple of its sum of digits (10).

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, 16648759 + ... + 17354641.

It is an arithmetic number, because the mean of its divisors is an integer number (195530220942).

Almost surely, 2^{12001211001100} is an apocalyptic number.

12001211001100 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 12001211001100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14078175907824).

12001211001100 is an abundant number, since it is smaller than the sum of its proper divisors (16155140814548).

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

12001211001100 is a wasteful number, since it uses less digits than its factorization.

12001211001100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706124 (or 706117 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 12001211001100 its reverse (110011210021), we get a palindrome (12111222211121).

The spelling of 12001211001100 in words is "twelve trillion, one billion, two hundred eleven million, one thousand, one hundred".