201304043123 has 16 divisors (see below), whose sum is σ = 213160190976.
Its totient is φ = 189710246880.
The previous prime is 201304043071. The next prime is 201304043131. The reversal of 201304043123 is 321340403102.
It is a cyclic number.
It is not a de Polignac number, because 201304043123 - 226 = 201236934259 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (23).
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (201304048123) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2396786 + ... + 2479352.
It is an arithmetic number, because the mean of its divisors is an integer number (13322511936).
Almost surely, 2201304043123 is an apocalyptic number.
201304043123 is a gapful number since it is divisible by the number (23) formed by its first and last digit.
201304043123 is a deficient number, since it is larger than the sum of its proper divisors (11856147853).
201304043123 is a wasteful number, since it uses less digits than its factorization.
201304043123 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 84154.
The product of its (nonzero) digits is 1728, while the sum is 23.
Adding to 201304043123 its reverse (321340403102), we get a palindrome (522644446225).
The spelling of 201304043123 in words is "two hundred one billion, three hundred four million, forty-three thousand, one hundred twenty-three".