231121113 has 16 divisors (see below), whose sum is σ = 315418560. Its totient is φ = 150486336.

The previous prime is 231121109. The next prime is 231121133. The reversal of 231121113 is 311121132.

It is a happy number.

231121113 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 231121113 - 2² = 231121109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231121092 and 231121101.

It is not an unprimeable number, because it can be changed into a prime (231121133) 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, 23631 + ... + 31947.

It is an arithmetic number, because the mean of its divisors is an integer number (19713660).

Almost surely, 2^231121113 is an apocalyptic number.

It is an amenable number.

231121113 is a deficient number, since it is larger than the sum of its proper divisors (84297447).

231121113 is a wasteful number, since it uses less digits than its factorization.

231121113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8536.

The product of its digits is 36, while the sum is 15.

The square root of 231121113 is about 15202.6679566450. The cubic root of 231121113 is about 613.6864581645.

Adding to 231121113 its reverse (311121132), we get a palindrome (542242245).

The spelling of 231121113 in words is "two hundred thirty-one million, one hundred twenty-one thousand, one hundred thirteen".