10123203121 has 4 divisors (see below), whose sum is σ = 10156178032. Its totient is φ = 10090228212.

The previous prime is 10123203019. The next prime is 10123203131. The reversal of 10123203121 is 12130232101.

10123203121 is digitally balanced in base 2, 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10123203121 - 2²⁹ = 9586332209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10123203095 and 10123203104.

It is not an unprimeable number, because it can be changed into a prime (10123203131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16486995 + ... + 16487608.

It is an arithmetic number, because the mean of its divisors is an integer number (2539044508).

Almost surely, 2^10123203121 is an apocalyptic number.

It is an amenable number.

10123203121 is a deficient number, since it is larger than the sum of its proper divisors (32974911).

10123203121 is an equidigital number, since it uses as much as digits as its factorization.

10123203121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32974910.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 10123203121 its reverse (12130232101), we get a palindrome (22253435222).

The spelling of 10123203121 in words is "ten billion, one hundred twenty-three million, two hundred three thousand, one hundred twenty-one".