231111110421 has 12 divisors (see below), whose sum is σ = 336455721472. Its totient is φ = 152860891176.

The previous prime is 231111110411. The next prime is 231111110423. The reversal of 231111110421 is 124011111132.

231111110421 is a `hidden beast` number, since 23 + 1 + 111 + 110 + 421 = 666.

It is not a de Polignac number, because 231111110421 - 2⁹ = 231111109909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 231111110394 and 231111110403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231111110423) 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 11 ways as a sum of consecutive naturals, for example, 101097331 + ... + 101099616.

Almost surely, 2^231111110421 is an apocalyptic number.

It is an amenable number.

231111110421 is a deficient number, since it is larger than the sum of its proper divisors (105344611051).

231111110421 is a wasteful number, since it uses less digits than its factorization.

231111110421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202197080 (or 202197077 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 231111110421 its reverse (124011111132), we get a palindrome (355122221553).

The spelling of 231111110421 in words is "two hundred thirty-one billion, one hundred eleven million, one hundred ten thousand, four hundred twenty-one".