231223123211 has 16 divisors (see below), whose sum is σ = 237927144000. Its totient is φ = 224571916800.

The previous prime is 231223123207. The next prime is 231223123223. The reversal of 231223123211 is 112321322132.

It is a cyclic number.

It is not a de Polignac number, because 231223123211 - 2² = 231223123207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231223123231) 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 15 ways as a sum of consecutive naturals, for example, 9016175 + ... + 9041783.

It is an arithmetic number, because the mean of its divisors is an integer number (14870446500).

Almost surely, 2^231223123211 is an apocalyptic number.

231223123211 is a deficient number, since it is larger than the sum of its proper divisors (6704020789).

231223123211 is a wasteful number, since it uses less digits than its factorization.

231223123211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26630.

The product of its digits is 864, while the sum is 23.

Adding to 231223123211 its reverse (112321322132), we get a palindrome (343544445343).

The spelling of 231223123211 in words is "two hundred thirty-one billion, two hundred twenty-three million, one hundred twenty-three thousand, two hundred eleven".