12121101200 has 120 divisors (see below), whose sum is σ = 32724863808. Its totient is φ = 4280855040.

The previous prime is 12121101199. The next prime is 12121101211. The reversal of 12121101200 is 210112121.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68927 + ... + 170273.

Almost surely, 2^12121101200 is an apocalyptic number.

12121101200 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 12121101200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16362431904).

12121101200 is an abundant number, since it is smaller than the sum of its proper divisors (20603762608).

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

12121101200 is a wasteful number, since it uses less digits than its factorization.

12121101200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101401 (or 101390 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 12121101200 its reverse (210112121), we get a palindrome (12331213321).

The spelling of 12121101200 in words is "twelve billion, one hundred twenty-one million, one hundred one thousand, two hundred".