20121123300 has 72 divisors (see below), whose sum is σ = 59571041376. Its totient is φ = 5240847360.

The previous prime is 20121123241. The next prime is 20121123391. The reversal of 20121123300 is 332112102.

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 20121123300.

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, 766989 + ... + 792788.

Almost surely, 2^20121123300 is an apocalyptic number.

20121123300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20121123300 is an abundant number, since it is smaller than the sum of its proper divisors (39449918076).

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

20121123300 is a wasteful number, since it uses less digits than its factorization.

20121123300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1559837 (or 1559830 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20121123300 its reverse (332112102), we get a palindrome (20453235402).

The spelling of 20121123300 in words is "twenty billion, one hundred twenty-one million, one hundred twenty-three thousand, three hundred".