321210124242391 has 2 divisors, whose sum is σ = 321210124242392. Its totient is φ = 321210124242390.

The previous prime is 321210124242389. The next prime is 321210124242431. The reversal of 321210124242391 is 193242421012123.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 321210124242391 - 2¹ = 321210124242389 is a prime.

Together with 321210124242389, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 321210124242391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321210124242331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160605062121195 + 160605062121196.

It is an arithmetic number, because the mean of its divisors is an integer number (160605062121196).

Almost surely, 2^{321210124242391} is an apocalyptic number.

321210124242391 is a deficient number, since it is larger than the sum of its proper divisors (1).

321210124242391 is an equidigital number, since it uses as much as digits as its factorization.

321210124242391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 37.

The spelling of 321210124242391 in words is "three hundred twenty-one trillion, two hundred ten billion, one hundred twenty-four million, two hundred forty-two thousand, three hundred ninety-one".