2002021331 has 2 divisors, whose sum is σ = 2002021332. Its totient is φ = 2002021330.

The previous prime is 2002021327. The next prime is 2002021381. The reversal of 2002021331 is 1331202002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2002021331 - 2² = 2002021327 is a prime.

It is a super-2 number, since 2×2002021331² = 8016178819558023122, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2002021381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001010665 + 1001010666.

It is an arithmetic number, because the mean of its divisors is an integer number (1001010666).

Almost surely, 2^2002021331 is an apocalyptic number.

2002021331 is a deficient number, since it is larger than the sum of its proper divisors (1).

2002021331 is an equidigital number, since it uses as much as digits as its factorization.

2002021331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 2002021331 is about 44743.9530104348. The cubic root of 2002021331 is about 1260.3453598944.

Adding to 2002021331 its reverse (1331202002), we get a palindrome (3333223333).

The spelling of 2002021331 in words is "two billion, two million, twenty-one thousand, three hundred thirty-one".