231113320211 has 4 divisors (see below), whose sum is σ = 236488048632. Its totient is φ = 225738591792.

The previous prime is 231113320177. The next prime is 231113320237. The reversal of 231113320211 is 112023311132.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231113320211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231113328211) 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, 2687364146 + ... + 2687364231.

It is an arithmetic number, because the mean of its divisors is an integer number (59122012158).

Almost surely, 2^231113320211 is an apocalyptic number.

231113320211 is a deficient number, since it is larger than the sum of its proper divisors (5374728421).

231113320211 is an equidigital number, since it uses as much as digits as its factorization.

231113320211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5374728420.

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

Adding to 231113320211 its reverse (112023311132), we get a palindrome (343136631343).

The spelling of 231113320211 in words is "two hundred thirty-one billion, one hundred thirteen million, three hundred twenty thousand, two hundred eleven".