13121121200 has 120 divisors (see below), whose sum is σ = 34429800816. Its totient is φ = 4765696000.

The previous prime is 13121121197. The next prime is 13121121217. The reversal of 13121121200 is 212112131.

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, 6304160 + ... + 6306240.

Almost surely, 2^13121121200 is an apocalyptic number.

13121121200 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 13121121200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17214900408).

13121121200 is an abundant number, since it is smaller than the sum of its proper divisors (21308679616).

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

13121121200 is a wasteful number, since it uses less digits than its factorization.

13121121200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3543 (or 3532 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 13121121200 its reverse (212112131), we get a palindrome (13333233331).

The spelling of 13121121200 in words is "thirteen billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred".