223021343021 has 4 divisors (see below), whose sum is σ = 223024174044. Its totient is φ = 223018512000.

The previous prime is 223021342981. The next prime is 223021343033. The reversal of 223021343021 is 120343120322.

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 141488822500 + 81532520521 = 376150^2 + 285539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223021343021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223021343081) 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, 1293860 + ... + 1456061.

It is an arithmetic number, because the mean of its divisors is an integer number (55756043511).

Almost surely, 2^223021343021 is an apocalyptic number.

It is an amenable number.

223021343021 is a deficient number, since it is larger than the sum of its proper divisors (2831023).

223021343021 is an equidigital number, since it uses as much as digits as its factorization.

223021343021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2831022.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 223021343021 its reverse (120343120322), we get a palindrome (343364463343).

The spelling of 223021343021 in words is "two hundred twenty-three billion, twenty-one million, three hundred forty-three thousand, twenty-one".