201420123 has 4 divisors (see below), whose sum is σ = 268560168. Its totient is φ = 134280080.

The previous prime is 201420103. The next prime is 201420179. The reversal of 201420123 is 321024102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201420123 - 2⁵ = 201420091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201420103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33570018 + ... + 33570023.

It is an arithmetic number, because the mean of its divisors is an integer number (67140042).

Almost surely, 2^201420123 is an apocalyptic number.

201420123 is a deficient number, since it is larger than the sum of its proper divisors (67140045).

201420123 is an equidigital number, since it uses as much as digits as its factorization.

201420123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67140044.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 201420123 is about 14192.2557403677. The cubic root of 201420123 is about 586.1844393356.

Adding to 201420123 its reverse (321024102), we get a palindrome (522444225).

The spelling of 201420123 in words is "two hundred one million, four hundred twenty thousand, one hundred twenty-three".