2001312313220 has 48 divisors (see below), whose sum is σ = 4595268585600. Its totient is φ = 726092152320.

The previous prime is 2001312313213. The next prime is 2001312313237. The reversal of 2001312313220 is 223132131002.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 2001312313192 and 2001312313201.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10264325 + ... + 10457484.

It is an arithmetic number, because the mean of its divisors is an integer number (95734762200).

Almost surely, 2^{2001312313220} is an apocalyptic number.

2001312313220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001312313220 is an abundant number, since it is smaller than the sum of its proper divisors (2593956272380).

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

2001312313220 is a wasteful number, since it uses less digits than its factorization.

2001312313220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20722268 (or 20722266 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 2001312313220 its reverse (223132131002), we get a palindrome (2224444444222).

The spelling of 2001312313220 in words is "two trillion, one billion, three hundred twelve million, three hundred thirteen thousand, two hundred twenty".