12213010321 has 4 divisors (see below), whose sum is σ = 12443444532. Its totient is φ = 11982576112.

The previous prime is 12213010319. The next prime is 12213010333. The reversal of 12213010321 is 12301031221.

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 3774750721 + 8438259600 = 61439^2 + 91860^2 .

It is a cyclic number.

It is not a de Polignac number, because 12213010321 - 2¹ = 12213010319 is a prime.

It is a super-2 number, since 2×12213010321² (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 = 12213010295 and 12213010304.

It is not an unprimeable number, because it can be changed into a prime (12213010391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115217026 + ... + 115217131.

It is an arithmetic number, because the mean of its divisors is an integer number (3110861133).

Almost surely, 2^12213010321 is an apocalyptic number.

It is an amenable number.

12213010321 is a deficient number, since it is larger than the sum of its proper divisors (230434211).

12213010321 is an equidigital number, since it uses as much as digits as its factorization.

12213010321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230434210.

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

Adding to 12213010321 its reverse (12301031221), we get a palindrome (24514041542).

The spelling of 12213010321 in words is "twelve billion, two hundred thirteen million, ten thousand, three hundred twenty-one".