1331002001 has 4 divisors (see below), whose sum is σ = 1521145152. Its totient is φ = 1140858852.

The previous prime is 1331001953. The next prime is 1331002021. The reversal of 1331002001 is 1002001331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1331002001 - 2³⁰ = 257260177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331002021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95071565 + ... + 95071578.

It is an arithmetic number, because the mean of its divisors is an integer number (380286288).

Almost surely, 2^1331002001 is an apocalyptic number.

It is an amenable number.

1331002001 is a deficient number, since it is larger than the sum of its proper divisors (190143151).

1331002001 is an equidigital number, since it uses as much as digits as its factorization.

1331002001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190143150.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 1331002001 is about 36482.9001177264. The cubic root of 1331002001 is about 1100.0005512394. Note that the first 3 decimals are identical.

Adding to 1331002001 its reverse (1002001331), we get a palindrome (2333003332).

The spelling of 1331002001 in words is "one billion, three hundred thirty-one million, two thousand, one".