231666123611 has 24 divisors (see below), whose sum is σ = 262254308064. Its totient is φ = 203050045440.

The previous prime is 231666123607. The next prime is 231666123709. The reversal of 231666123611 is 116321666132.

It is not a de Polignac number, because 231666123611 - 2² = 231666123607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231666153611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5591291 + ... + 5632571.

It is an arithmetic number, because the mean of its divisors is an integer number (10927262836).

Almost surely, 2^231666123611 is an apocalyptic number.

231666123611 is a deficient number, since it is larger than the sum of its proper divisors (30588184453).

231666123611 is a wasteful number, since it uses less digits than its factorization.

231666123611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41591 (or 41454 counting only the distinct ones).

The product of its digits is 46656, while the sum is 38.

Adding to 231666123611 its reverse (116321666132), we get a palindrome (347987789743).

The spelling of 231666123611 in words is "two hundred thirty-one billion, six hundred sixty-six million, one hundred twenty-three thousand, six hundred eleven".