2001320323203 has 16 divisors (see below), whose sum is σ = 2681087713920. Its totient is φ = 1327887212736.

The previous prime is 2001320323199. The next prime is 2001320323207. The reversal of 2001320323203 is 3023230231002.

It is an interprime number because it is at equal distance from previous prime (2001320323199) and next prime (2001320323207).

It is not a de Polignac number, because 2001320323203 - 2² = 2001320323199 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2001320323203.

It is not an unprimeable number, because it can be changed into a prime (2001320323207) 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, 1526976 + ... + 2516802.

It is an arithmetic number, because the mean of its divisors is an integer number (167567982120).

Almost surely, 2^{2001320323203} is an apocalyptic number.

2001320323203 is a deficient number, since it is larger than the sum of its proper divisors (679767390717).

2001320323203 is a wasteful number, since it uses less digits than its factorization.

2001320323203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993026.

The product of its (nonzero) digits is 1296, while the sum is 21.

Adding to 2001320323203 its reverse (3023230231002), we get a palindrome (5024550554205).

The spelling of 2001320323203 in words is "two trillion, one billion, three hundred twenty million, three hundred twenty-three thousand, two hundred three".