201542241111 has 16 divisors (see below), whose sum is σ = 274929984000. Its totient is φ = 131293064448.

The previous prime is 201542241037. The next prime is 201542241143. The reversal of 201542241111 is 111142245102.

It is not a de Polignac number, because 201542241111 - 2¹⁹ = 201541716823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201542241161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4360461 + ... + 4406438.

It is an arithmetic number, because the mean of its divisors is an integer number (17183124000).

Almost surely, 2^201542241111 is an apocalyptic number.

201542241111 is a deficient number, since it is larger than the sum of its proper divisors (73387742889).

201542241111 is an equidigital number, since it uses as much as digits as its factorization.

201542241111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8767078.

The product of its (nonzero) digits is 640, while the sum is 24.

Adding to 201542241111 its reverse (111142245102), we get a palindrome (312684486213).

The spelling of 201542241111 in words is "two hundred one billion, five hundred forty-two million, two hundred forty-one thousand, one hundred eleven".