12213211123021 has 4 divisors (see below), whose sum is σ = 12225315396700. Its totient is φ = 12201106849344.

The previous prime is 12213211122971. The next prime is 12213211123027. The reversal of 12213211123021 is 12032111231221.

It is a happy number.

12213211123021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 4626155722500 + 7587055400521 = 2150850^2 + 2754461^2 .

It is a cyclic number.

It is not a de Polignac number, because 12213211123021 - 2⁴³ = 3417118100813 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12213211122983 and 12213211123001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12213211123027) 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, 6052135326 + ... + 6052137343.

It is an arithmetic number, because the mean of its divisors is an integer number (3056328849175).

Almost surely, 2^{12213211123021} is an apocalyptic number.

It is an amenable number.

12213211123021 is a deficient number, since it is larger than the sum of its proper divisors (12104273679).

12213211123021 is a wasteful number, since it uses less digits than its factorization.

12213211123021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12104273678.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 12213211123021 its reverse (12032111231221), we get a palindrome (24245322354242).

The spelling of 12213211123021 in words is "twelve trillion, two hundred thirteen billion, two hundred eleven million, one hundred twenty-three thousand, twenty-one".