12121323300 has 144 divisors (see below), whose sum is σ = 39141453120. Its totient is φ = 3217950720.

The previous prime is 12121323283. The next prime is 12121323301. The reversal of 12121323300 is 332312121.

12121323300 is a `hidden beast` number, since 1 + 21 + 21 + 323 + 300 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (12121323301) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 603012 + ... + 622788.

Almost surely, 2^12121323300 is an apocalyptic number.

12121323300 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 12121323300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19570726560).

12121323300 is an abundant number, since it is smaller than the sum of its proper divisors (27020129820).

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

12121323300 is a wasteful number, since it uses less digits than its factorization.

12121323300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20027 (or 20014 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 12121323300 its reverse (332312121), we get a palindrome (12453635421).

The spelling of 12121323300 in words is "twelve billion, one hundred twenty-one million, three hundred twenty-three thousand, three hundred".