2001320311 has 2 divisors, whose sum is σ = 2001320312. Its totient is φ = 2001320310.

The previous prime is 2001320261. The next prime is 2001320317. The reversal of 2001320311 is 1130231002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2001320311 - 2¹⁵ = 2001287543 is a prime.

It is a super-2 number, since 2×2001320311² = 8010565974442273442, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2001320291 and 2001320300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001320317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000660155 + 1000660156.

It is an arithmetic number, because the mean of its divisors is an integer number (1000660156).

Almost surely, 2^2001320311 is an apocalyptic number.

2001320311 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001320311 is an equidigital number, since it uses as much as digits as its factorization.

2001320311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 2001320311 is about 44736.1186403112. The cubic root of 2001320311 is about 1260.1982368452.

Adding to 2001320311 its reverse (1130231002), we get a palindrome (3131551313).

The spelling of 2001320311 in words is "two billion, one million, three hundred twenty thousand, three hundred eleven".