2001213313243 has 2 divisors, whose sum is σ = 2001213313244. Its totient is φ = 2001213313242.

The previous prime is 2001213313223. The next prime is 2001213313313. The reversal of 2001213313243 is 3423133121002.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001213313243 is a prime.

It is not a weakly prime, because it can be changed into another prime (2001213313223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000606656621 + 1000606656622.

It is an arithmetic number, because the mean of its divisors is an integer number (1000606656622).

Almost surely, 2^{2001213313243} is an apocalyptic number.

2001213313243 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001213313243 is an equidigital number, since it uses as much as digits as its factorization.

2001213313243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 2001213313243 its reverse (3423133121002), we get a palindrome (5424346434245).

The spelling of 2001213313243 in words is "two trillion, one billion, two hundred thirteen million, three hundred thirteen thousand, two hundred forty-three".