223220121321 has 4 divisors (see below), whose sum is σ = 297626828432. Its totient is φ = 148813414212.

The previous prime is 223220121277. The next prime is 223220121373. The reversal of 223220121321 is 123121022322.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 223220121321 - 2¹⁷ = 223219990249 is a prime.

It is a super-3 number, since 3×223220121321³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (223220121391) 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, 37203353551 + ... + 37203353556.

It is an arithmetic number, because the mean of its divisors is an integer number (74406707108).

Almost surely, 2^223220121321 is an apocalyptic number.

It is an amenable number.

223220121321 is a deficient number, since it is larger than the sum of its proper divisors (74406707111).

223220121321 is an equidigital number, since it uses as much as digits as its factorization.

223220121321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74406707110.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 223220121321 its reverse (123121022322), we get a palindrome (346341143643).

It can be divided in two parts, 2232201 and 21321, that added together give a palindrome (2253522).

The spelling of 223220121321 in words is "two hundred twenty-three billion, two hundred twenty million, one hundred twenty-one thousand, three hundred twenty-one".