223304204311021 has 4 divisors (see below), whose sum is σ = 223309283028700. Its totient is φ = 223299125593344.

The previous prime is 223304204310937. The next prime is 223304204311049. The reversal of 223304204311021 is 120113402403322.

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 200462017888521 + 22842186422500 = 14158461^2 + 4779350^2 .

It is a cyclic number.

It is not a de Polignac number, because 223304204311021 - 2⁷ = 223304204310893 is a prime.

It is a super-2 number, since 2×223304204311021² (a number of 29 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 (223304234311021) 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, 2539292886 + ... + 2539380823.

It is an arithmetic number, because the mean of its divisors is an integer number (55827320757175).

Almost surely, 2^{223304204311021} is an apocalyptic number.

It is an amenable number.

223304204311021 is a deficient number, since it is larger than the sum of its proper divisors (5078717679).

223304204311021 is an equidigital number, since it uses as much as digits as its factorization.

223304204311021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5078717678.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 223304204311021 its reverse (120113402403322), we get a palindrome (343417606714343).

The spelling of 223304204311021 in words is "two hundred twenty-three trillion, three hundred four billion, two hundred four million, three hundred eleven thousand, twenty-one".