123110032013 has 4 divisors (see below), whose sum is σ = 130351798620. Its totient is φ = 115868265408.

The previous prime is 123110032007. The next prime is 123110032121. The reversal of 123110032013 is 310230011321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 39266196649 + 83843835364 = 198157^2 + 289558^2 .

It is a cyclic number.

It is not a de Polignac number, because 123110032013 - 2¹² = 123110027917 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 7241766589 = 123110032013 / (1 + 2 + 3 + 1 + 1 + 0 + 0 + 3 + 2 + 0 + 1 + 3).

It is a junction number, because it is equal to n+sod(n) for n = 123110031982 and 123110032000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123110032613) 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, 3620883278 + ... + 3620883311.

It is an arithmetic number, because the mean of its divisors is an integer number (32587949655).

Almost surely, 2^123110032013 is an apocalyptic number.

It is an amenable number.

123110032013 is a deficient number, since it is larger than the sum of its proper divisors (7241766607).

123110032013 is an equidigital number, since it uses as much as digits as its factorization.

123110032013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7241766606.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 123110032013 its reverse (310230011321), we get a palindrome (433340043334).

The spelling of 123110032013 in words is "one hundred twenty-three billion, one hundred ten million, thirty-two thousand, thirteen".