10123230021 has 4 divisors (see below), whose sum is σ = 13497640032. Its totient is φ = 6748820012.

The previous prime is 10123229981. The next prime is 10123230037. The reversal of 10123230021 is 12003232101.

10123230021 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 10123230021 - 2⁶ = 10123229957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10123280021) 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, 1687205001 + ... + 1687205006.

It is an arithmetic number, because the mean of its divisors is an integer number (3374410008).

Almost surely, 2^10123230021 is an apocalyptic number.

It is an amenable number.

10123230021 is a deficient number, since it is larger than the sum of its proper divisors (3374410011).

10123230021 is an equidigital number, since it uses as much as digits as its factorization.

10123230021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3374410010.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 10123230021 its reverse (12003232101), we get a palindrome (22126462122).

The spelling of 10123230021 in words is "ten billion, one hundred twenty-three million, two hundred thirty thousand, twenty-one".