2001200031 has 12 divisors (see below), whose sum is σ = 3016301808. Its totient is φ = 1276127424.

The previous prime is 2001200011. The next prime is 2001200039. The reversal of 2001200031 is 1300021002.

It is a happy number.

It is not a de Polignac number, because 2001200031 - 2⁷ = 2001199903 is a prime.

It is a super-2 number, since 2×2001200031² = 8009603128148801922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 2001199986 and 2001200022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001200039) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4833610 + ... + 4834023.

It is an arithmetic number, because the mean of its divisors is an integer number (251358484).

Almost surely, 2^2001200031 is an apocalyptic number.

2001200031 is a deficient number, since it is larger than the sum of its proper divisors (1015101777).

2001200031 is a wasteful number, since it uses less digits than its factorization.

2001200031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9667662 (or 9667659 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 2001200031 is about 44734.7742924897. The cubic root of 2001200031 is about 1260.1729902318.

Adding to 2001200031 its reverse (1300021002), we get a palindrome (3301221033).

The spelling of 2001200031 in words is "two billion, one million, two hundred thousand, thirty-one".