201121131233209 has 16 divisors (see below), whose sum is σ = 221032135368576. Its totient is φ = 181481649148800.

The previous prime is 201121131233203. The next prime is 201121131233213. The reversal of 201121131233209 is 902332131121102.

It is a happy number.

It is not a de Polignac number, because 201121131233209 - 2³ = 201121131233201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201121131233201) 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, 5155204 + ... + 20707930.

It is an arithmetic number, because the mean of its divisors is an integer number (13814508460536).

Almost surely, 2^{201121131233209} is an apocalyptic number.

It is an amenable number.

201121131233209 is a deficient number, since it is larger than the sum of its proper divisors (19911004135367).

201121131233209 is a wasteful number, since it uses less digits than its factorization.

201121131233209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15561456.

The product of its (nonzero) digits is 3888, while the sum is 31.

The spelling of 201121131233209 in words is "two hundred one trillion, one hundred twenty-one billion, one hundred thirty-one million, two hundred thirty-three thousand, two hundred nine".