10123123231 has 4 divisors (see below), whose sum is σ = 10901825032. Its totient is φ = 9344421432.

The previous prime is 10123123223. The next prime is 10123123261. The reversal of 10123123231 is 13232132101.

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 10123123231 - 2³ = 10123123223 is a prime.

It is a super-2 number, since 2×10123123231² (a number of 21 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 = 10123123199 and 10123123208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10123123261) 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, 389350881 + ... + 389350906.

It is an arithmetic number, because the mean of its divisors is an integer number (2725456258).

Almost surely, 2^10123123231 is an apocalyptic number.

10123123231 is a deficient number, since it is larger than the sum of its proper divisors (778701801).

10123123231 is an equidigital number, since it uses as much as digits as its factorization.

10123123231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778701800.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 10123123231 its reverse (13232132101), we get a palindrome (23355255332).

The spelling of 10123123231 in words is "ten billion, one hundred twenty-three million, one hundred twenty-three thousand, two hundred thirty-one".