10013123021 has 4 divisors (see below), whose sum is σ = 10923406944. Its totient is φ = 9102839100.

The previous prime is 10013123017. The next prime is 10013123027. The reversal of 10013123021 is 12032131001.

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 10013123021 - 2² = 10013123017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10013122987 and 10013123005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10013123027) 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, 455141945 + ... + 455141966.

It is an arithmetic number, because the mean of its divisors is an integer number (2730851736).

Almost surely, 2^10013123021 is an apocalyptic number.

10013123021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10013123021 is a deficient number, since it is larger than the sum of its proper divisors (910283923).

10013123021 is an equidigital number, since it uses as much as digits as its factorization.

10013123021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910283922.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 10013123021 its reverse (12032131001), we get a palindrome (22045254022).

The spelling of 10013123021 in words is "ten billion, thirteen million, one hundred twenty-three thousand, twenty-one".