321211343231 has 4 divisors (see below), whose sum is σ = 321213067272. Its totient is φ = 321209619192.

The previous prime is 321211343227. The next prime is 321211343261. The reversal of 321211343231 is 132343112123.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132343112123 = 127 ⋅1042071749.

It is a cyclic number.

It is not a de Polignac number, because 321211343231 - 2² = 321211343227 is a prime.

It is a super-2 number, since 2×321211343231² (a number of 24 digits) contains 22 as substring.

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 321211343231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321211343261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 543260 + ... + 968273.

It is an arithmetic number, because the mean of its divisors is an integer number (80303266818).

Almost surely, 2^321211343231 is an apocalyptic number.

321211343231 is a deficient number, since it is larger than the sum of its proper divisors (1724041).

321211343231 is a wasteful number, since it uses less digits than its factorization.

321211343231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1724040.

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

Adding to 321211343231 its reverse (132343112123), we get a palindrome (453554455354).

The spelling of 321211343231 in words is "three hundred twenty-one billion, two hundred eleven million, three hundred forty-three thousand, two hundred thirty-one".