12109897800 has 1296 divisors, whose sum is σ = 56497633920. Its totient is φ = 2273356800.

The previous prime is 12109897783. The next prime is 12109897841. The reversal of 12109897800 is 879890121.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 323 ways as a sum of consecutive naturals, for example, 257657377 + ... + 257657423.

Almost surely, 2^12109897800 is an apocalyptic number.

12109897800 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 12109897800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28248816960).

12109897800 is an abundant number, since it is smaller than the sum of its proper divisors (44387736120).

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

12109897800 is a wasteful number, since it uses less digits than its factorization.

12109897800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 45.

It can be divided in two parts, 12109 and 897800, that added together give a palindrome (909909).

The spelling of 12109897800 in words is "twelve billion, one hundred nine million, eight hundred ninety-seven thousand, eight hundred".