201342123 has 24 divisors (see below), whose sum is σ = 299636688. Its totient is φ = 130185792.

The previous prime is 201342079. The next prime is 201342131. The reversal of 201342123 is 321243102.

201342123 is a `hidden beast` number, since 201 + 342 + 123 = 666.

It is not a de Polignac number, because 201342123 - 2⁶ = 201342059 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201342096 and 201342105.

It is not an unprimeable number, because it can be changed into a prime (201342133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 131440 + ... + 132962.

It is an arithmetic number, because the mean of its divisors is an integer number (12484862).

Almost surely, 2^201342123 is an apocalyptic number.

201342123 is a deficient number, since it is larger than the sum of its proper divisors (98294565).

201342123 is a wasteful number, since it uses less digits than its factorization.

201342123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1963 (or 1960 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 201342123 is about 14189.5074967386. The cubic root of 201342123 is about 586.1087628692.

Adding to 201342123 its reverse (321243102), we get a palindrome (522585225).

The spelling of 201342123 in words is "two hundred one million, three hundred forty-two thousand, one hundred twenty-three".