321158909911 has 16 divisors (see below), whose sum is σ = 392068482624. Its totient is φ = 256793370624.

The previous prime is 321158909891. The next prime is 321158909923. The reversal of 321158909911 is 119909851123.

It is a de Polignac number, because none of the positive numbers 2^k-321158909911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321158909011) 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 15 ways as a sum of consecutive naturals, for example, 11928210 + ... + 11955103.

It is an arithmetic number, because the mean of its divisors is an integer number (24504280164).

Almost surely, 2^321158909911 is an apocalyptic number.

321158909911 is a deficient number, since it is larger than the sum of its proper divisors (70909572713).

321158909911 is a wasteful number, since it uses less digits than its factorization.

321158909911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23883450.

The product of its (nonzero) digits is 174960, while the sum is 49.

The spelling of 321158909911 in words is "three hundred twenty-one billion, one hundred fifty-eight million, nine hundred nine thousand, nine hundred eleven".