2001220349 has 2 divisors, whose sum is σ = 2001220350. Its totient is φ = 2001220348.

The previous prime is 2001220307. The next prime is 2001220393. The reversal of 2001220349 is 9430221002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1824144100 + 177076249 = 42710^2 + 13307^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001220349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001220549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000610174 + 1000610175.

It is an arithmetic number, because the mean of its divisors is an integer number (1000610175).

Almost surely, 2^2001220349 is an apocalyptic number.

It is an amenable number.

2001220349 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001220349 is an equidigital number, since it uses as much as digits as its factorization.

2001220349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 2001220349 is about 44735.0013859394. The cubic root of 2001220349 is about 1260.1772550242.

The spelling of 2001220349 in words is "two billion, one million, two hundred twenty thousand, three hundred forty-nine".