10120123109 has 4 divisors (see below), whose sum is σ = 10123402380. Its totient is φ = 10116843840.

The previous prime is 10120123093. The next prime is 10120123141. The reversal of 10120123109 is 90132102101.

10120123109 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 9895872484 + 224250625 = 99478^2 + 14975^2 .

It is a cyclic number.

It is not a de Polignac number, because 10120123109 - 2⁴ = 10120123093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10120123609) 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, 1635002 + ... + 1641179.

It is an arithmetic number, because the mean of its divisors is an integer number (2530850595).

Almost surely, 2^10120123109 is an apocalyptic number.

It is an amenable number.

10120123109 is a deficient number, since it is larger than the sum of its proper divisors (3279271).

10120123109 is an equidigital number, since it uses as much as digits as its factorization.

10120123109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3279270.

The product of its (nonzero) digits is 108, while the sum is 20.

The spelling of 10120123109 in words is "ten billion, one hundred twenty million, one hundred twenty-three thousand, one hundred nine".