12121212300 has 72 divisors (see below), whose sum is σ = 35564723712. Its totient is φ = 3186792000.

The previous prime is 12121212287. The next prime is 12121212329. The reversal of 12121212300 is 321212121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 12121212300.

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, 263236 + ... + 305835.

It is an arithmetic number, because the mean of its divisors is an integer number (493954496).

Almost surely, 2^12121212300 is an apocalyptic number.

12121212300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12121212300 is an abundant number, since it is smaller than the sum of its proper divisors (23443511412).

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

12121212300 is a wasteful number, since it uses less digits than its factorization.

12121212300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569159 (or 569152 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 12121212300 its reverse (321212121), we get a palindrome (12442424421).

The spelling of 12121212300 in words is "twelve billion, one hundred twenty-one million, two hundred twelve thousand, three hundred".