2001131203 has 4 divisors (see below), whose sum is σ = 2001561408. Its totient is φ = 2000701000.

The previous prime is 2001131179. The next prime is 2001131219. The reversal of 2001131203 is 3021311002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001131203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001131903) 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, 208048 + ... + 217453.

It is an arithmetic number, because the mean of its divisors is an integer number (500390352).

Almost surely, 2^2001131203 is an apocalyptic number.

2001131203 is a deficient number, since it is larger than the sum of its proper divisors (430205).

2001131203 is an equidigital number, since it uses as much as digits as its factorization.

2001131203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430204.

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

The square root of 2001131203 is about 44734.0049961995. The cubic root of 2001131203 is about 1260.1585428703.

Adding to 2001131203 its reverse (3021311002), we get a palindrome (5022442205).

The spelling of 2001131203 in words is "two billion, one million, one hundred thirty-one thousand, two hundred three".