321122145871 has 4 divisors (see below), whose sum is σ = 321554343312. Its totient is φ = 320689948432.

The previous prime is 321122145803. The next prime is 321122145907. The reversal of 321122145871 is 178541221123.

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 321122145871 - 2²⁷ = 320987928143 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 321122145871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321122145671) 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, 216097606 + ... + 216099091.

It is an arithmetic number, because the mean of its divisors is an integer number (80388585828).

Almost surely, 2^321122145871 is an apocalyptic number.

321122145871 is a deficient number, since it is larger than the sum of its proper divisors (432197441).

321122145871 is an equidigital number, since it uses as much as digits as its factorization.

321122145871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432197440.

The product of its digits is 26880, while the sum is 37.

Adding to 321122145871 its reverse (178541221123), we get a palindrome (499663366994).

The spelling of 321122145871 in words is "three hundred twenty-one billion, one hundred twenty-two million, one hundred forty-five thousand, eight hundred seventy-one".