201321002123 has 8 divisors (see below), whose sum is σ = 211920992400. Its totient is φ = 190721426688.

The previous prime is 201321002039. The next prime is 201321002143. The reversal of 201321002123 is 321200123102.

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

It is a cyclic number.

It is not a de Polignac number, because 201321002123 - 2²⁴ = 201304224907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201321002143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1673315 + ... + 1789587.

It is an arithmetic number, because the mean of its divisors is an integer number (26490124050).

Almost surely, 2^201321002123 is an apocalyptic number.

201321002123 is a deficient number, since it is larger than the sum of its proper divisors (10599990277).

201321002123 is a wasteful number, since it uses less digits than its factorization.

201321002123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207421.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 201321002123 its reverse (321200123102), we get a palindrome (522521125225).

The spelling of 201321002123 in words is "two hundred one billion, three hundred twenty-one million, two thousand, one hundred twenty-three".