321131213197 has 4 divisors (see below), whose sum is σ = 321137079840. Its totient is φ = 321125346556.

The previous prime is 321131213177. The next prime is 321131213209. The reversal of 321131213197 is 791312131123.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 791312131123 = 17 ⋅46547772419.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321131213197 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 (321131213177) 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, 2850433 + ... + 2960950.

It is an arithmetic number, because the mean of its divisors is an integer number (80284269960).

Almost surely, 2^321131213197 is an apocalyptic number.

It is an amenable number.

321131213197 is a deficient number, since it is larger than the sum of its proper divisors (5866643).

321131213197 is an equidigital number, since it uses as much as digits as its factorization.

321131213197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5866642.

The product of its digits is 6804, while the sum is 34.

The spelling of 321131213197 in words is "three hundred twenty-one billion, one hundred thirty-one million, two hundred thirteen thousand, one hundred ninety-seven".