201111144 has 64 divisors (see below), whose sum is σ = 550381440. Its totient is φ = 60860160.

The previous prime is 201111107. The next prime is 201111161. The reversal of 201111144 is 441111102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13749 + ... + 24315.

It is an arithmetic number, because the mean of its divisors is an integer number (8599710).

Almost surely, 2^201111144 is an apocalyptic number.

201111144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201111144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275190720).

201111144 is an abundant number, since it is smaller than the sum of its proper divisors (349270296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201111144 is a wasteful number, since it uses less digits than its factorization.

201111144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10650 (or 10646 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 201111144 is about 14181.3660837029. The cubic root of 201111144 is about 585.8845497808.

Adding to 201111144 its reverse (441111102), we get a palindrome (642222246).

The spelling of 201111144 in words is "two hundred one million, one hundred eleven thousand, one hundred forty-four".