321979209213 has 16 divisors (see below), whose sum is σ = 435754700480. Its totient is φ = 211428873216.

The previous prime is 321979209203. The next prime is 321979209221. The reversal of 321979209213 is 312902979123.

It is not a de Polignac number, because 321979209213 - 2⁴ = 321979209197 is a prime.

It is a super-3 number, since 3×321979209213³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321979209203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2206431 + ... + 2347827.

It is an arithmetic number, because the mean of its divisors is an integer number (27234668780).

Almost surely, 2^321979209213 is an apocalyptic number.

It is an amenable number.

321979209213 is a deficient number, since it is larger than the sum of its proper divisors (113775491267).

321979209213 is a wasteful number, since it uses less digits than its factorization.

321979209213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152796.

The product of its (nonzero) digits is 367416, while the sum is 48.

The spelling of 321979209213 in words is "three hundred twenty-one billion, nine hundred seventy-nine million, two hundred nine thousand, two hundred thirteen".