12302002021 has 4 divisors (see below), whose sum is σ = 12303643500. Its totient is φ = 12300360544.

The previous prime is 12302002003. The next prime is 12302002051. The reversal of 12302002021 is 12020020321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2403940900 + 9898061121 = 49030^2 + 99489^2 .

It is a cyclic number.

It is not a de Polignac number, because 12302002021 - 2¹³ = 12301993829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12302001992 and 12302002010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12302002051) 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, 809446 + ... + 824503.

It is an arithmetic number, because the mean of its divisors is an integer number (3075910875).

Almost surely, 2^12302002021 is an apocalyptic number.

It is an amenable number.

12302002021 is a deficient number, since it is larger than the sum of its proper divisors (1641479).

12302002021 is an equidigital number, since it uses as much as digits as its factorization.

12302002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1641478.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 12302002021 its reverse (12020020321), we get a palindrome (24322022342).

The spelling of 12302002021 in words is "twelve billion, three hundred two million, two thousand, twenty-one".