231121123 has 8 divisors (see below), whose sum is σ = 236020928. Its totient is φ = 226264104.

The previous prime is 231121109. The next prime is 231121133. The reversal of 231121123 is 321121132.

231121123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231121123 is a prime.

It is a super-2 number, since 2×231121123² = 106833946993562258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231121097 and 231121106.

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 7 ways as a sum of consecutive naturals, for example, 340 + ... + 21502.

It is an arithmetic number, because the mean of its divisors is an integer number (29502616).

Almost surely, 2^231121123 is an apocalyptic number.

231121123 is a deficient number, since it is larger than the sum of its proper divisors (4899805).

231121123 is a wasteful number, since it uses less digits than its factorization.

231121123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21393.

The product of its digits is 72, while the sum is 16.

The square root of 231121123 is about 15202.6682855346. The cubic root of 231121123 is about 613.6864670154.

Adding to 231121123 its reverse (321121132), we get a palindrome (552242255).

Subtracting 231121123 from its reverse (321121132), we obtain a palindrome (90000009).

The spelling of 231121123 in words is "two hundred thirty-one million, one hundred twenty-one thousand, one hundred twenty-three".