201001101091 has 16 divisors (see below), whose sum is σ = 231859967680. Its totient is φ = 170678845440.

The previous prime is 201001101071. The next prime is 201001101127. The reversal of 201001101091 is 190101100102.

It is a cyclic number.

It is not a de Polignac number, because 201001101091 - 2²³ = 200992712483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201001101071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5843455 + ... + 5877751.

It is an arithmetic number, because the mean of its divisors is an integer number (14491247980).

Almost surely, 2^201001101091 is an apocalyptic number.

201001101091 is a deficient number, since it is larger than the sum of its proper divisors (30858866589).

201001101091 is a wasteful number, since it uses less digits than its factorization.

201001101091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42094.

The product of its (nonzero) digits is 18, while the sum is 16.

Adding to 201001101091 its reverse (190101100102), we get a palindrome (391102201193).

The spelling of 201001101091 in words is "two hundred one billion, one million, one hundred one thousand, ninety-one".