201111312423 has 32 divisors (see below), whose sum is σ = 322617507840. Its totient is φ = 108861170400.

The previous prime is 201111312377. The next prime is 201111312427. The reversal of 201111312423 is 324213111102.

201111312423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 201111312423 - 2²⁹ = 200574441511 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 201111312423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201111312427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5228086 + ... + 5266412.

It is an arithmetic number, because the mean of its divisors is an integer number (10081797120).

Almost surely, 2^201111312423 is an apocalyptic number.

201111312423 is a deficient number, since it is larger than the sum of its proper divisors (121506195417).

201111312423 is a wasteful number, since it uses less digits than its factorization.

201111312423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51507.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 201111312423 its reverse (324213111102), we get a palindrome (525324423525).

The spelling of 201111312423 in words is "two hundred one billion, one hundred eleven million, three hundred twelve thousand, four hundred twenty-three".