20121100300 has 180 divisors, whose sum is σ = 51328930016. Its totient is φ = 6845731200.

The previous prime is 20121100297. The next prime is 20121100319. The reversal of 20121100300 is 300112102.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 43457869 + ... + 43458331.

Almost surely, 2^20121100300 is an apocalyptic number.

20121100300 is a gapful number since it is divisible by the number (20) 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 20121100300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25664465008).

20121100300 is an abundant number, since it is smaller than the sum of its proper divisors (31207829716).

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

20121100300 is a wasteful number, since it uses less digits than its factorization.

20121100300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686 (or 658 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 20121100300 its reverse (300112102), we get a palindrome (20421212402).

The spelling of 20121100300 in words is "twenty billion, one hundred twenty-one million, one hundred thousand, three hundred".