201001011001243 has 2 divisors, whose sum is σ = 201001011001244. Its totient is φ = 201001011001242.

The previous prime is 201001011001187. The next prime is 201001011001277. The reversal of 201001011001243 is 342100110100102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201001011001243 - 2⁴⁵ = 165816638912411 is a prime.

It is not a weakly prime, because it can be changed into another prime (201001011001283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100500505500621 + 100500505500622.

It is an arithmetic number, because the mean of its divisors is an integer number (100500505500622).

Almost surely, 2^{201001011001243} is an apocalyptic number.

201001011001243 is a deficient number, since it is larger than the sum of its proper divisors (1).

201001011001243 is an equidigital number, since it uses as much as digits as its factorization.

201001011001243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 201001011001243 its reverse (342100110100102), we get a palindrome (543101121101345).

The spelling of 201001011001243 in words is "two hundred one trillion, one billion, eleven million, one thousand, two hundred forty-three".