10012123321 has 4 divisors (see below), whose sum is σ = 10539077200. Its totient is φ = 9485169444.

The previous prime is 10012123313. The next prime is 10012123333. The reversal of 10012123321 is 12332121001.

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 10012123321 - 2³ = 10012123313 is a prime.

It is a super-2 number, since 2×10012123321² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10012123295 and 10012123304.

It is not an unprimeable number, because it can be changed into a prime (10012123921) 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, 263476911 + ... + 263476948.

It is an arithmetic number, because the mean of its divisors is an integer number (2634769300).

Almost surely, 2^10012123321 is an apocalyptic number.

It is an amenable number.

10012123321 is a deficient number, since it is larger than the sum of its proper divisors (526953879).

10012123321 is an equidigital number, since it uses as much as digits as its factorization.

10012123321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526953878.

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

Adding to 10012123321 its reverse (12332121001), we get a palindrome (22344244322).

The spelling of 10012123321 in words is "ten billion, twelve million, one hundred twenty-three thousand, three hundred twenty-one".