20121120300 has 72 divisors (see below), whose sum is σ = 58351935376. Its totient is φ = 5353205760.

The previous prime is 20121120277. The next prime is 20121120301. The reversal of 20121120300 is 302112102.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (20121120301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52452 + ... + 207348.

Almost surely, 2^20121120300 is an apocalyptic number.

20121120300 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 20121120300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29175967688).

20121120300 is an abundant number, since it is smaller than the sum of its proper divisors (38230815076).

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

20121120300 is a wasteful number, since it uses less digits than its factorization.

20121120300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155347 (or 155340 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 20121120300 its reverse (302112102), we get a palindrome (20423232402).

The spelling of 20121120300 in words is "twenty billion, one hundred twenty-one million, one hundred twenty thousand, three hundred".