12021112111100 has 144 divisors (see below), whose sum is σ = 26735095094400. Its totient is φ = 4690151904000.

The previous prime is 12021112111051. The next prime is 12021112111171. The reversal of 12021112111100 is 111121112021.

It is a congruent 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, 486849755 + ... + 486874445.

It is an arithmetic number, because the mean of its divisors is an integer number (185660382600).

Almost surely, 2^{12021112111100} is an apocalyptic number.

12021112111100 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 12021112111100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13367547547200).

12021112111100 is an abundant number, since it is smaller than the sum of its proper divisors (14713982983300).

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

12021112111100 is a wasteful number, since it uses less digits than its factorization.

12021112111100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25404 (or 25397 counting only the distinct ones).

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

Adding to 12021112111100 its reverse (111121112021), we get a palindrome (12132233223121).

The spelling of 12021112111100 in words is "twelve trillion, twenty-one billion, one hundred twelve million, one hundred eleven thousand, one hundred".