231310213211 has 16 divisors (see below), whose sum is σ = 297689561088. Its totient is φ = 174427473600.

The previous prime is 231310213207. The next prime is 231310213213. The reversal of 231310213211 is 112312013132.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 231310213211 - 2² = 231310213207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231310213213) 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, 48449690 + ... + 48454463.

It is an arithmetic number, because the mean of its divisors is an integer number (18605597568).

Almost surely, 2^231310213211 is an apocalyptic number.

231310213211 is a deficient number, since it is larger than the sum of its proper divisors (66379347877).

231310213211 is a wasteful number, since it uses less digits than its factorization.

231310213211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96904202.

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

Adding to 231310213211 its reverse (112312013132), we get a palindrome (343622226343).

The spelling of 231310213211 in words is "two hundred thirty-one billion, three hundred ten million, two hundred thirteen thousand, two hundred eleven".