321231006143 has 4 divisors (see below), whose sum is σ = 326025498840. Its totient is φ = 316436513448.

The previous prime is 321231006133. The next prime is 321231006181. The reversal of 321231006143 is 341600132123.

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 321231006143 - 2²⁰ = 321229957567 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 (321231006133) 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, 2397246248 + ... + 2397246381.

It is an arithmetic number, because the mean of its divisors is an integer number (81506374710).

Almost surely, 2^321231006143 is an apocalyptic number.

321231006143 is a deficient number, since it is larger than the sum of its proper divisors (4794492697).

321231006143 is an equidigital number, since it uses as much as digits as its factorization.

321231006143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4794492696.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 321231006143 its reverse (341600132123), we get a palindrome (662831138266).

The spelling of 321231006143 in words is "three hundred twenty-one billion, two hundred thirty-one million, six thousand, one hundred forty-three".