12334721021 has 4 divisors (see below), whose sum is σ = 14096824032. Its totient is φ = 10572618012.

The previous prime is 12334720987. The next prime is 12334721029. The reversal of 12334721021 is 12012743321.

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: 12012743321 = 59 ⋅203605819.

It is a cyclic number.

It is not a de Polignac number, because 12334721021 - 2²⁶ = 12267612157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12334721029) 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, 881051495 + ... + 881051508.

It is an arithmetic number, because the mean of its divisors is an integer number (3524206008).

Almost surely, 2^12334721021 is an apocalyptic number.

It is an amenable number.

12334721021 is a deficient number, since it is larger than the sum of its proper divisors (1762103011).

12334721021 is an equidigital number, since it uses as much as digits as its factorization.

12334721021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1762103010.

The product of its (nonzero) digits is 2016, while the sum is 26.

The spelling of 12334721021 in words is "twelve billion, three hundred thirty-four million, seven hundred twenty-one thousand, twenty-one".