123120113 has 4 divisors (see below), whose sum is σ = 125443188. Its totient is φ = 120797040.

The previous prime is 123120091. The next prime is 123120131. The reversal of 123120113 is 311021321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 311021321 = 13 ⋅23924717.

It can be written as a sum of positive squares in 2 ways, for example, as 72880369 + 50239744 = 8537^2 + 7088^2 .

It is a cyclic number.

It is not a de Polignac number, because 123120113 - 2¹⁰ = 123119089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123120163) 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, 1161458 + ... + 1161563.

It is an arithmetic number, because the mean of its divisors is an integer number (31360797).

Almost surely, 2^123120113 is an apocalyptic number.

It is an amenable number.

123120113 is a deficient number, since it is larger than the sum of its proper divisors (2323075).

123120113 is an equidigital number, since it uses as much as digits as its factorization.

123120113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2323074.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 123120113 is about 11095.9502972932. The cubic root of 123120113 is about 497.4808127075.

Adding to 123120113 its reverse (311021321), we get a palindrome (434141434).

The spelling of 123120113 in words is "one hundred twenty-three million, one hundred twenty thousand, one hundred thirteen".