12321001021 has 8 divisors (see below), whose sum is σ = 14101236864. Its totient is φ = 10545788400.

The previous prime is 12321000997. The next prime is 12321001027. The reversal of 12321001021 is 12010012321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12321001021 - 2²¹ = 12318903869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12321000992 and 12321001010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12321001027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1250545 + ... + 1260358.

It is an arithmetic number, because the mean of its divisors is an integer number (1762654608).

Almost surely, 2^12321001021 is an apocalyptic number.

It is an amenable number.

12321001021 is a deficient number, since it is larger than the sum of its proper divisors (1780235843).

12321001021 is an equidigital number, since it uses as much as digits as its factorization.

12321001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2511611.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 12321001021 its reverse (12010012321), we get a palindrome (24331013342).

The spelling of 12321001021 in words is "twelve billion, three hundred twenty-one million, one thousand, twenty-one".