12213030323021 has 24 divisors (see below), whose sum is σ = 14231215995192. Its totient is φ = 10436922214400.

The previous prime is 12213030322973. The next prime is 12213030323023. The reversal of 12213030323021 is 12032303031221.

It can be written as a sum of positive squares in 4 ways, for example, as 4944668242921 + 7268362080100 = 2223661^2 + 2695990^2 .

It is not a de Polignac number, because 12213030323021 - 2¹⁴ = 12213030306637 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 (12213030323023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1927100 + ... + 5304693.

It is an arithmetic number, because the mean of its divisors is an integer number (592967333133).

Almost surely, 2^{12213030323021} is an apocalyptic number.

12213030323021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12213030323021 is a deficient number, since it is larger than the sum of its proper divisors (2018185672171).

12213030323021 is a wasteful number, since it uses less digits than its factorization.

12213030323021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7232653 (or 7232642 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 12213030323021 its reverse (12032303031221), we get a palindrome (24245333354242).

The spelling of 12213030323021 in words is "twelve trillion, two hundred thirteen billion, thirty million, three hundred twenty-three thousand, twenty-one".