201321143 has 4 divisors (see below), whose sum is σ = 201349560. Its totient is φ = 201292728.

The previous prime is 201321101. The next prime is 201321149. The reversal of 201321143 is 341123102.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 201321143 - 2⁸ = 201320887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201321149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5996 + ... + 20942.

It is an arithmetic number, because the mean of its divisors is an integer number (50337390).

Almost surely, 2^201321143 is an apocalyptic number.

201321143 is a deficient number, since it is larger than the sum of its proper divisors (28417).

201321143 is a wasteful number, since it uses less digits than its factorization.

201321143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28416.

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

The square root of 201321143 is about 14188.7681988254. The cubic root of 201321143 is about 586.0884045047.

Adding to 201321143 its reverse (341123102), we get a palindrome (542444245).

The spelling of 201321143 in words is "two hundred one million, three hundred twenty-one thousand, one hundred forty-three".