2001043720243 has 2 divisors, whose sum is σ = 2001043720244. Its totient is φ = 2001043720242.

The previous prime is 2001043720231. The next prime is 2001043720297. The reversal of 2001043720243 is 3420273401002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2001043720243 - 2²⁹ = 2000506849331 is a prime.

It is not a weakly prime, because it can be changed into another prime (2001041720243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000521860121 + 1000521860122.

It is an arithmetic number, because the mean of its divisors is an integer number (1000521860122).

Almost surely, 2^{2001043720243} is an apocalyptic number.

2001043720243 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001043720243 is an equidigital number, since it uses as much as digits as its factorization.

2001043720243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 28.

The spelling of 2001043720243 in words is "two trillion, one billion, forty-three million, seven hundred twenty thousand, two hundred forty-three".