201091001911 has 2 divisors, whose sum is σ = 201091001912. Its totient is φ = 201091001910.

The previous prime is 201091001873. The next prime is 201091001921. The reversal of 201091001911 is 119100190102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201091001911 - 2¹⁷ = 201090870839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201091001921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100545500955 + 100545500956.

It is an arithmetic number, because the mean of its divisors is an integer number (100545500956).

Almost surely, 2^201091001911 is an apocalyptic number.

201091001911 is a deficient number, since it is larger than the sum of its proper divisors (1).

201091001911 is an equidigital number, since it uses as much as digits as its factorization.

201091001911 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 25.

The spelling of 201091001911 in words is "two hundred one billion, ninety-one million, one thousand, nine hundred eleven".