201240111 has 4 divisors (see below), whose sum is σ = 268320152. Its totient is φ = 134160072.

The previous prime is 201240089. The next prime is 201240113. The reversal of 201240111 is 111042102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 201240111 - 2⁵ = 201240079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201240113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33540016 + ... + 33540021.

It is an arithmetic number, because the mean of its divisors is an integer number (67080038).

Almost surely, 2^201240111 is an apocalyptic number.

201240111 is a deficient number, since it is larger than the sum of its proper divisors (67080041).

201240111 is an equidigital number, since it uses as much as digits as its factorization.

201240111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67080040.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 201240111 is about 14185.9124133769. The cubic root of 201240111 is about 586.0097601919.

Adding to 201240111 its reverse (111042102), we get a palindrome (312282213).

The spelling of 201240111 in words is "two hundred one million, two hundred forty thousand, one hundred eleven".