2001220393 has 2 divisors, whose sum is σ = 2001220394. Its totient is φ = 2001220392.

The previous prime is 2001220349. The next prime is 2001220421. The reversal of 2001220393 is 3930221002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1872465984 + 128754409 = 43272^2 + 11347^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001220393 is a prime.

It is a super-2 number, since 2×2001220393² = 8009766122718148898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2001220303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000610196 + 1000610197.

It is an arithmetic number, because the mean of its divisors is an integer number (1000610197).

Almost surely, 2^2001220393 is an apocalyptic number.

It is an amenable number.

2001220393 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001220393 is an equidigital number, since it uses as much as digits as its factorization.

2001220393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 2001220393 is about 44735.0018777243. The cubic root of 2001220393 is about 1260.1772642599.

Adding to 2001220393 its reverse (3930221002), we get a palindrome (5931441395).

The spelling of 2001220393 in words is "two billion, one million, two hundred twenty thousand, three hundred ninety-three".