231313120211 has 4 divisors (see below), whose sum is σ = 232732219272. Its totient is φ = 229894021152.

The previous prime is 231313120183. The next prime is 231313120237. The reversal of 231313120211 is 112021313132.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 231313120211 - 2¹⁸ = 231312858067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231313120711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 709549286 + ... + 709549611.

It is an arithmetic number, because the mean of its divisors is an integer number (58183054818).

Almost surely, 2^231313120211 is an apocalyptic number.

231313120211 is a deficient number, since it is larger than the sum of its proper divisors (1419099061).

231313120211 is a wasteful number, since it uses less digits than its factorization.

231313120211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1419099060.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 231313120211 its reverse (112021313132), we get a palindrome (343334433343).

The spelling of 231313120211 in words is "two hundred thirty-one billion, three hundred thirteen million, one hundred twenty thousand, two hundred eleven".