201101200891 has 2 divisors, whose sum is σ = 201101200892. Its totient is φ = 201101200890.

The previous prime is 201101200873. The next prime is 201101200913. The reversal of 201101200891 is 198002101102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201101200891 - 2³¹ = 198953717243 is a prime.

It is not a weakly prime, because it can be changed into another prime (201101200291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100550600445 + 100550600446.

It is an arithmetic number, because the mean of its divisors is an integer number (100550600446).

Almost surely, 2^201101200891 is an apocalyptic number.

201101200891 is a deficient number, since it is larger than the sum of its proper divisors (1).

201101200891 is an equidigital number, since it uses as much as digits as its factorization.

201101200891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 25.

Adding to 201101200891 its reverse (198002101102), we get a palindrome (399103301993).

The spelling of 201101200891 in words is "two hundred one billion, one hundred one million, two hundred thousand, eight hundred ninety-one".