201123142 has 8 divisors (see below), whose sum is σ = 329110632. Its totient is φ = 91419600.

The previous prime is 201123137. The next prime is 201123187. The reversal of 201123142 is 241321102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 4570959 + ... + 4571002.

It is an arithmetic number, because the mean of its divisors is an integer number (41138829).

Almost surely, 2^201123142 is an apocalyptic number.

201123142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

201123142 is a deficient number, since it is larger than the sum of its proper divisors (127987490).

201123142 is a wasteful number, since it uses less digits than its factorization.

201123142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9141974.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 201123142 is about 14181.7890972895. The cubic root of 201123142 is about 585.8962005574.

Adding to 201123142 its reverse (241321102), we get a palindrome (442444244).

The spelling of 201123142 in words is "two hundred one million, one hundred twenty-three thousand, one hundred forty-two".