231312213311 has 16 divisors (see below), whose sum is σ = 245597093280. Its totient is φ = 217103278080.

The previous prime is 231312213283. The next prime is 231312213329. The reversal of 231312213311 is 113312213132.

It is a cyclic number.

It is not a de Polignac number, because 231312213311 - 2³⁰ = 230238471487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231312213211) 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, 14623775 + ... + 14639583.

It is an arithmetic number, because the mean of its divisors is an integer number (15349818330).

Almost surely, 2^231312213311 is an apocalyptic number.

231312213311 is a deficient number, since it is larger than the sum of its proper divisors (14284879969).

231312213311 is a wasteful number, since it uses less digits than its factorization.

231312213311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18154.

The product of its digits is 648, while the sum is 23.

Adding to 231312213311 its reverse (113312213132), we get a palindrome (344624426443).

The spelling of 231312213311 in words is "two hundred thirty-one billion, three hundred twelve million, two hundred thirteen thousand, three hundred eleven".