130123505123 has 4 divisors (see below), whose sum is σ = 135781048848. Its totient is φ = 124465961400.

The previous prime is 130123505111. The next prime is 130123505131. The reversal of 130123505123 is 321505321031.

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 130123505123 - 2¹⁰ = 130123504099 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 130123505092 and 130123505101.

It is not an unprimeable number, because it can be changed into a prime (130123505923) 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, 2828771828 + ... + 2828771873.

It is an arithmetic number, because the mean of its divisors is an integer number (33945262212).

Almost surely, 2^130123505123 is an apocalyptic number.

130123505123 is a deficient number, since it is larger than the sum of its proper divisors (5657543725).

130123505123 is an equidigital number, since it uses as much as digits as its factorization.

130123505123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5657543724.

The product of its (nonzero) digits is 2700, while the sum is 26.

Adding to 130123505123 its reverse (321505321031), we get a palindrome (451628826154).

The spelling of 130123505123 in words is "one hundred thirty billion, one hundred twenty-three million, five hundred five thousand, one hundred twenty-three".