12223222220221 has 4 divisors (see below), whose sum is σ = 12390663620572. Its totient is φ = 12055780819872.

The previous prime is 12223222220201. The next prime is 12223222220323. The reversal of 12223222220221 is 12202222232221.

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 7099853348025 + 5123368872196 = 2664555^2 + 2263486^2 .

It is not a de Polignac number, because 12223222220221 - 2⁹ = 12223222219709 is a prime.

It is a super-2 number, since 2×12223222220221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12223222220201) 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, 83720700066 + ... + 83720700211.

It is an arithmetic number, because the mean of its divisors is an integer number (3097665905143).

Almost surely, 2^{12223222220221} is an apocalyptic number.

It is an amenable number.

12223222220221 is a deficient number, since it is larger than the sum of its proper divisors (167441400351).

12223222220221 is an equidigital number, since it uses as much as digits as its factorization.

12223222220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167441400350.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 12223222220221 its reverse (12202222232221), we get a palindrome (24425444452442).

The spelling of 12223222220221 in words is "twelve trillion, two hundred twenty-three billion, two hundred twenty-two million, two hundred twenty thousand, two hundred twenty-one".