211231287321 has 8 divisors (see below), whose sum is σ = 281665747200. Its totient is φ = 140808842832.

The previous prime is 211231287257. The next prime is 211231287361. The reversal of 211231287321 is 123782132112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 211231287321 - 2⁶ = 211231287257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211231287361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2962746 + ... + 3033203.

It is an arithmetic number, because the mean of its divisors is an integer number (35208218400).

Almost surely, 2^211231287321 is an apocalyptic number.

It is an amenable number.

211231287321 is a deficient number, since it is larger than the sum of its proper divisors (70434459879).

211231287321 is a wasteful number, since it uses less digits than its factorization.

211231287321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6007695.

The product of its digits is 8064, while the sum is 33.

The spelling of 211231287321 in words is "two hundred eleven billion, two hundred thirty-one million, two hundred eighty-seven thousand, three hundred twenty-one".