201011201011997 has 2 divisors, whose sum is σ = 201011201011998. Its totient is φ = 201011201011996.

The previous prime is 201011201011967. The next prime is 201011201012033. The reversal of 201011201011997 is 799110102110102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143796288097081 + 57214912914916 = 11991509^2 + 7564054^2 .

It is a cyclic number.

It is not a de Polignac number, because 201011201011997 - 2²⁰ = 201011199963421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201011201011927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100505600505998 + 100505600505999.

It is an arithmetic number, because the mean of its divisors is an integer number (100505600505999).

Almost surely, 2^{201011201011997} is an apocalyptic number.

It is an amenable number.

201011201011997 is a deficient number, since it is larger than the sum of its proper divisors (1).

201011201011997 is an equidigital number, since it uses as much as digits as its factorization.

201011201011997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 35.

The spelling of 201011201011997 in words is "two hundred one trillion, eleven billion, two hundred one million, eleven thousand, nine hundred ninety-seven".