12223311221021 has 4 divisors (see below), whose sum is σ = 12237248862972. Its totient is φ = 12209373579072.

The previous prime is 12223311221003. The next prime is 12223311221029. The reversal of 12223311221021 is 12012211332221.

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 6350148002500 + 5873163218521 = 2519950^2 + 2423461^2 .

It is a cyclic number.

It is not a de Polignac number, because 12223311221021 - 2¹⁸ = 12223310958877 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12223311221029) 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, 6968819660 + ... + 6968821413.

It is an arithmetic number, because the mean of its divisors is an integer number (3059312215743).

Almost surely, 2^{12223311221021} is an apocalyptic number.

It is an amenable number.

12223311221021 is a deficient number, since it is larger than the sum of its proper divisors (13937641951).

12223311221021 is an equidigital number, since it uses as much as digits as its factorization.

12223311221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13937641950.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 12223311221021 its reverse (12012211332221), we get a palindrome (24235522553242).

The spelling of 12223311221021 in words is "twelve trillion, two hundred twenty-three billion, three hundred eleven million, two hundred twenty-one thousand, twenty-one".