201111200001 has 24 divisors (see below), whose sum is σ = 302340648064. Its totient is φ = 133590066480.

The previous prime is 201111199997. The next prime is 201111200027. The reversal of 201111200001 is 100002111102.

It is a happy number.

It is not a de Polignac number, because 201111200001 - 2² = 201111199997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201111201001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1426585 + ... + 1561206.

Almost surely, 2^201111200001 is an apocalyptic number.

It is an amenable number.

201111200001 is a deficient number, since it is larger than the sum of its proper divisors (101229448063).

201111200001 is an equidigital number, since it uses as much as digits as its factorization.

201111200001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2988083 (or 2988071 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 201111200001 its reverse (100002111102), we get a palindrome (301113311103).

The spelling of 201111200001 in words is "two hundred one billion, one hundred eleven million, two hundred thousand, one".