2001203131 has 4 divisors (see below), whose sum is σ = 2019906072. Its totient is φ = 1982500192.

The previous prime is 2001203119. The next prime is 2001203143. The reversal of 2001203131 is 1313021002.

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

It is an interprime number because it is at equal distance from previous prime (2001203119) and next prime (2001203143).

It is a cyclic number.

It is not a de Polignac number, because 2001203131 - 2¹⁵ = 2001170363 is a prime.

It is a super-3 number, since 3×2001203131³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001206131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9351310 + ... + 9351523.

It is an arithmetic number, because the mean of its divisors is an integer number (504976518).

Almost surely, 2^2001203131 is an apocalyptic number.

2001203131 is a deficient number, since it is larger than the sum of its proper divisors (18702941).

2001203131 is a wasteful number, since it uses less digits than its factorization.

2001203131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18702940.

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

The square root of 2001203131 is about 44734.8089411367. The cubic root of 2001203131 is about 1260.1736409304.

Adding to 2001203131 its reverse (1313021002), we get a palindrome (3314224133).

The spelling of 2001203131 in words is "two billion, one million, two hundred three thousand, one hundred thirty-one".