2001320203 has 2 divisors, whose sum is σ = 2001320204. Its totient is φ = 2001320202.

The previous prime is 2001320197. The next prime is 2001320213. The reversal of 2001320203 is 3020231002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2001320203 - 2²⁹ = 1464449291 is a prime.

It is a super-2 number, since 2×2001320203² = 8010565109871922418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2001320213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000660101 + 1000660102.

It is an arithmetic number, because the mean of its divisors is an integer number (1000660102).

Almost surely, 2^2001320203 is an apocalyptic number.

2001320203 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001320203 is an equidigital number, since it uses as much as digits as its factorization.

2001320203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 2001320203 is about 44736.1174332328. The cubic root of 2001320203 is about 1260.1982141766.

Adding to 2001320203 its reverse (3020231002), we get a palindrome (5021551205).

The spelling of 2001320203 in words is "two billion, one million, three hundred twenty thousand, two hundred three".