20003121300000 has 288 divisors, whose sum is σ = 67404890435904. Its totient is φ = 5189996160000.

The previous prime is 20003121299999. The next prime is 20003121300011. The reversal of 20003121300000 is 312130002.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10198959 + ... + 12001041.

It is an arithmetic number, because the mean of its divisors is an integer number (234044758458).

Almost surely, 2^{20003121300000} is an apocalyptic number.

20003121300000 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 20003121300000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33702445217952).

20003121300000 is an abundant number, since it is smaller than the sum of its proper divisors (47401769135904).

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

20003121300000 is an equidigital number, since it uses as much as digits as its factorization.

20003121300000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1802158 (or 1802130 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 20003121300000 its reverse (312130002), we get a palindrome (20003433430002).

The spelling of 20003121300000 in words is "twenty trillion, three billion, one hundred twenty-one million, three hundred thousand".