10123349921 has 4 divisors (see below), whose sum is σ = 10130233344. Its totient is φ = 10116466500.

The previous prime is 10123349897. The next prime is 10123349933. The reversal of 10123349921 is 12994332101.

10123349921 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 10123349921 - 2⁶ = 10123349857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10123349021) 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, 3439505 + ... + 3442446.

It is an arithmetic number, because the mean of its divisors is an integer number (2532558336).

Almost surely, 2^10123349921 is an apocalyptic number.

It is an amenable number.

10123349921 is a deficient number, since it is larger than the sum of its proper divisors (6883423).

10123349921 is an equidigital number, since it uses as much as digits as its factorization.

10123349921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6883422.

The product of its (nonzero) digits is 11664, while the sum is 35.

The spelling of 10123349921 in words is "ten billion, one hundred twenty-three million, three hundred forty-nine thousand, nine hundred twenty-one".