201217564771 has 2 divisors, whose sum is σ = 201217564772. Its totient is φ = 201217564770.

The previous prime is 201217564759. The next prime is 201217564819. The reversal of 201217564771 is 177465712102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201217564771 - 2⁵ = 201217564739 is a prime.

It is not a weakly prime, because it can be changed into another prime (201217564711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100608782385 + 100608782386.

It is an arithmetic number, because the mean of its divisors is an integer number (100608782386).

Almost surely, 2^201217564771 is an apocalyptic number.

201217564771 is a deficient number, since it is larger than the sum of its proper divisors (1).

201217564771 is an equidigital number, since it uses as much as digits as its factorization.

201217564771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 164640, while the sum is 43.

The spelling of 201217564771 in words is "two hundred one billion, two hundred seventeen million, five hundred sixty-four thousand, seven hundred seventy-one".