123340321031 has 4 divisors (see below), whose sum is σ = 123356374032. Its totient is φ = 123324268032.

The previous prime is 123340320991. The next prime is 123340321079. The reversal of 123340321031 is 130123043321.

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 123340321031 - 2³⁰ = 122266579207 is a prime.

It is a super-2 number, since 2×123340321031² (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 = 123340320988 and 123340321006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123340321081) 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, 8014970 + ... + 8030343.

It is an arithmetic number, because the mean of its divisors is an integer number (30839093508).

Almost surely, 2^123340321031 is an apocalyptic number.

123340321031 is a deficient number, since it is larger than the sum of its proper divisors (16053001).

123340321031 is an equidigital number, since it uses as much as digits as its factorization.

123340321031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16053000.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 123340321031 its reverse (130123043321), we get a palindrome (253463364352).

The spelling of 123340321031 in words is "one hundred twenty-three billion, three hundred forty million, three hundred twenty-one thousand, thirty-one".