231404123311 has 4 divisors (see below), whose sum is σ = 232789776912. Its totient is φ = 230018469712.

The previous prime is 231404123303. The next prime is 231404123317. The reversal of 231404123311 is 113321404132.

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

It is a cyclic number.

It is not a de Polignac number, because 231404123311 - 2³ = 231404123303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231404123317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 692826550 + ... + 692826883.

It is an arithmetic number, because the mean of its divisors is an integer number (58197444228).

Almost surely, 2^231404123311 is an apocalyptic number.

231404123311 is a deficient number, since it is larger than the sum of its proper divisors (1385653601).

231404123311 is a wasteful number, since it uses less digits than its factorization.

231404123311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385653600.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 231404123311 its reverse (113321404132), we get a palindrome (344725527443).

The spelling of 231404123311 in words is "two hundred thirty-one billion, four hundred four million, one hundred twenty-three thousand, three hundred eleven".