12302120221 has 4 divisors (see below), whose sum is σ = 12355841500. Its totient is φ = 12248398944.

The previous prime is 12302120219. The next prime is 12302120231. The reversal of 12302120221 is 12202120321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12202120321 = 19 ⋅642216859.

It can be written as a sum of positive squares in 2 ways, for example, as 7764076996 + 4538043225 = 88114^2 + 67365^2 .

It is a cyclic number.

It is not a de Polignac number, because 12302120221 - 2¹ = 12302120219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12302120195 and 12302120204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12302120231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26860296 + ... + 26860753.

It is an arithmetic number, because the mean of its divisors is an integer number (3088960375).

Almost surely, 2^12302120221 is an apocalyptic number.

It is an amenable number.

12302120221 is a deficient number, since it is larger than the sum of its proper divisors (53721279).

12302120221 is an equidigital number, since it uses as much as digits as its factorization.

12302120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53721278.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 12302120221 its reverse (12202120321), we get a palindrome (24504240542).

The spelling of 12302120221 in words is "twelve billion, three hundred two million, one hundred twenty thousand, two hundred twenty-one".