2001200311 has 4 divisors (see below), whose sum is σ = 2183127624. Its totient is φ = 1819273000.

The previous prime is 2001200239. The next prime is 2001200323. The reversal of 2001200311 is 1130021002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2001200311 - 2²⁵ = 1967645879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001200371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90963640 + ... + 90963661.

It is an arithmetic number, because the mean of its divisors is an integer number (545781906).

Almost surely, 2^2001200311 is an apocalyptic number.

2001200311 is a deficient number, since it is larger than the sum of its proper divisors (181927313).

2001200311 is a wasteful number, since it uses less digits than its factorization.

2001200311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181927312.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 2001200311 is about 44734.7774220460. Note that the first 3 decimals coincide. The cubic root of 2001200311 is about 1260.1730490046.

Adding to 2001200311 its reverse (1130021002), we get a palindrome (3131221313).

The spelling of 2001200311 in words is "two billion, one million, two hundred thousand, three hundred eleven".