123234442231 has 4 divisors (see below), whose sum is σ = 123287266872. Its totient is φ = 123181617592.

The previous prime is 123234442171. The next prime is 123234442273. The reversal of 123234442231 is 132244432321.

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 123234442231 - 2⁷ = 123234442103 is a prime.

It is a super-2 number, since 2×123234442231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123234442193 and 123234442202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123234742231) 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, 26408821 + ... + 26413486.

It is an arithmetic number, because the mean of its divisors is an integer number (30821816718).

Almost surely, 2^123234442231 is an apocalyptic number.

123234442231 is a deficient number, since it is larger than the sum of its proper divisors (52824641).

123234442231 is an equidigital number, since it uses as much as digits as its factorization.

123234442231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52824640.

The product of its digits is 27648, while the sum is 31.

Adding to 123234442231 its reverse (132244432321), we get a palindrome (255478874552).

The spelling of 123234442231 in words is "one hundred twenty-three billion, two hundred thirty-four million, four hundred forty-two thousand, two hundred thirty-one".