2001321300020 has 48 divisors (see below), whose sum is σ = 4857139365120. Its totient is φ = 678457553664.

The previous prime is 2001321300007. The next prime is 2001321300023. The reversal of 2001321300020 is 200031231002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 2001321299968 and 2001321300004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001321300023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80297384 + ... + 80322303.

It is an arithmetic number, because the mean of its divisors is an integer number (101190403440).

Almost surely, 2^{2001321300020} is an apocalyptic number.

2001321300020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001321300020 is an abundant number, since it is smaller than the sum of its proper divisors (2855818065100).

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

2001321300020 is a wasteful number, since it uses less digits than its factorization.

2001321300020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160619792 (or 160619790 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 2001321300020 its reverse (200031231002), we get a palindrome (2201352531022).

The spelling of 2001321300020 in words is "two trillion, one billion, three hundred twenty-one million, three hundred thousand, twenty".