2001213337 has 2 divisors, whose sum is σ = 2001213338. Its totient is φ = 2001213336.

The previous prime is 2001213301. The next prime is 2001213341. The reversal of 2001213337 is 7333121002.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1209578841 + 791634496 = 34779^2 + 28136^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001213337 is a prime.

It is not a weakly prime, because it can be changed into another prime (2001211337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000606668 + 1000606669.

It is an arithmetic number, because the mean of its divisors is an integer number (1000606669).

Almost surely, 2^2001213337 is an apocalyptic number.

It is an amenable number.

2001213337 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001213337 is an equidigital number, since it uses as much as digits as its factorization.

2001213337 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 22.

The square root of 2001213337 is about 44734.9230132343. The cubic root of 2001213337 is about 1260.1757831934.

Adding to 2001213337 its reverse (7333121002), we get a palindrome (9334334339).

The spelling of 2001213337 in words is "two billion, one million, two hundred thirteen thousand, three hundred thirty-seven".