201021340043 has 2 divisors, whose sum is σ = 201021340044. Its totient is φ = 201021340042.

The previous prime is 201021340027. The next prime is 201021340073. The reversal of 201021340043 is 340043120102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201021340043 - 2⁴ = 201021340027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201021339997 and 201021340024.

It is not a weakly prime, because it can be changed into another prime (201021340073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100510670021 + 100510670022.

It is an arithmetic number, because the mean of its divisors is an integer number (100510670022).

Almost surely, 2^201021340043 is an apocalyptic number.

201021340043 is a deficient number, since it is larger than the sum of its proper divisors (1).

201021340043 is an equidigital number, since it uses as much as digits as its factorization.

201021340043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 201021340043 its reverse (340043120102), we get a palindrome (541064460145).

The spelling of 201021340043 in words is "two hundred one billion, twenty-one million, three hundred forty thousand, forty-three".