201311109 has 16 divisors (see below), whose sum is σ = 298468800. Its totient is φ = 134103888.

The previous prime is 201311101. The next prime is 201311113. The reversal of 201311109 is 901113102.

It is not a de Polignac number, because 201311109 - 2³ = 201311101 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 201311091 and 201311100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201311101) 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, 51382 + ... + 55160.

It is an arithmetic number, because the mean of its divisors is an integer number (18654300).

Almost surely, 2^201311109 is an apocalyptic number.

It is an amenable number.

201311109 is a deficient number, since it is larger than the sum of its proper divisors (97157691).

201311109 is a wasteful number, since it uses less digits than its factorization.

201311109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5761 (or 5755 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

The square root of 201311109 is about 14188.4146048810. The cubic root of 201311109 is about 586.0786673113.

The spelling of 201311109 in words is "two hundred one million, three hundred eleven thousand, one hundred nine".