321234132991 has 2 divisors, whose sum is σ = 321234132992. Its totient is φ = 321234132990.

The previous prime is 321234132983. The next prime is 321234133037. The reversal of 321234132991 is 199231432123.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 321234132991 - 2³ = 321234132983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321234132971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160617066495 + 160617066496.

It is an arithmetic number, because the mean of its divisors is an integer number (160617066496).

Almost surely, 2^321234132991 is an apocalyptic number.

321234132991 is a deficient number, since it is larger than the sum of its proper divisors (1).

321234132991 is an equidigital number, since it uses as much as digits as its factorization.

321234132991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 40.

The spelling of 321234132991 in words is "three hundred twenty-one billion, two hundred thirty-four million, one hundred thirty-two thousand, nine hundred ninety-one".