223004320021 has 4 divisors (see below), whose sum is σ = 254862080032. Its totient is φ = 191146560012.

The previous prime is 223004320001. The next prime is 223004320039. The reversal of 223004320021 is 120023400322.

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 a cyclic number.

It is not a de Polignac number, because 223004320021 - 2¹⁹ = 223003795733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223004320001) 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, 15928879995 + ... + 15928880008.

It is an arithmetic number, because the mean of its divisors is an integer number (63715520008).

Almost surely, 2^223004320021 is an apocalyptic number.

It is an amenable number.

223004320021 is a deficient number, since it is larger than the sum of its proper divisors (31857760011).

223004320021 is an equidigital number, since it uses as much as digits as its factorization.

223004320021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31857760010.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 223004320021 its reverse (120023400322), we get a palindrome (343027720343).

The spelling of 223004320021 in words is "two hundred twenty-three billion, four million, three hundred twenty thousand, twenty-one".