2001133231 has 2 divisors, whose sum is σ = 2001133232. Its totient is φ = 2001133230.

The previous prime is 2001133201. The next prime is 2001133249. The reversal of 2001133231 is 1323311002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2001133231 - 2⁷ = 2001133103 is a prime.

It is a super-2 number, since 2×2001133231² = 8009068416424998722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001133201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000566615 + 1000566616.

It is an arithmetic number, because the mean of its divisors is an integer number (1000566616).

Almost surely, 2^2001133231 is an apocalyptic number.

2001133231 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001133231 is an equidigital number, since it uses as much as digits as its factorization.

2001133231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 2001133231 is about 44734.0276635136. The cubic root of 2001133231 is about 1260.1589685629.

Adding to 2001133231 its reverse (1323311002), we get a palindrome (3324444233).

The spelling of 2001133231 in words is "two billion, one million, one hundred thirty-three thousand, two hundred thirty-one".