201240410243 has 2 divisors, whose sum is σ = 201240410244. Its totient is φ = 201240410242.

The previous prime is 201240410233. The next prime is 201240410303. The reversal of 201240410243 is 342014042102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201240410243 - 2¹⁰ = 201240409219 is a prime.

It is not a weakly prime, because it can be changed into another prime (201240410233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100620205121 + 100620205122.

It is an arithmetic number, because the mean of its divisors is an integer number (100620205122).

Almost surely, 2^201240410243 is an apocalyptic number.

201240410243 is a deficient number, since it is larger than the sum of its proper divisors (1).

201240410243 is an equidigital number, since it uses as much as digits as its factorization.

201240410243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 201240410243 its reverse (342014042102), we get a palindrome (543254452345).

The spelling of 201240410243 in words is "two hundred one billion, two hundred forty million, four hundred ten thousand, two hundred forty-three".