10123144021 has 4 divisors (see below), whose sum is σ = 10338530112. Its totient is φ = 9907757932.

The previous prime is 10123143971. The next prime is 10123144051. The reversal of 10123144021 is 12044132101.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12044132101 = 137 ⋅87913373.

It is a cyclic number.

It is not a de Polignac number, because 10123144021 - 2⁹ = 10123143509 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10123144021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10123144051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107692975 + ... + 107693068.

It is an arithmetic number, because the mean of its divisors is an integer number (2584632528).

Almost surely, 2^10123144021 is an apocalyptic number.

It is an amenable number.

10123144021 is a deficient number, since it is larger than the sum of its proper divisors (215386091).

10123144021 is an equidigital number, since it uses as much as digits as its factorization.

10123144021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215386090.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 10123144021 its reverse (12044132101), we get a palindrome (22167276122).

The spelling of 10123144021 in words is "ten billion, one hundred twenty-three million, one hundred forty-four thousand, twenty-one".