20121021300 has 36 divisors (see below), whose sum is σ = 58216822496. Its totient is φ = 5365605600.

The previous prime is 20121021233. The next prime is 20121021331. The reversal of 20121021300 is 312012102.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33534736 + ... + 33535335.

Almost surely, 2^20121021300 is an apocalyptic number.

20121021300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20121021300 is an abundant number, since it is smaller than the sum of its proper divisors (38095801196).

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

20121021300 is a wasteful number, since it uses less digits than its factorization.

20121021300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67070088 (or 67070081 counting only the distinct ones).

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

Adding to 20121021300 its reverse (312012102), we get a palindrome (20433033402).

The spelling of 20121021300 in words is "twenty billion, one hundred twenty-one million, twenty-one thousand, three hundred".