223000321021 has 4 divisors (see below), whose sum is σ = 223038142812. Its totient is φ = 222962499232.

The previous prime is 223000321009. The next prime is 223000321073. The reversal of 223000321021 is 120123000322.

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 122492300121 + 100508020900 = 349989^2 + 317030^2 .

It is a cyclic number.

It is not a de Polignac number, because 223000321021 - 2⁹ = 223000320509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 223000320986 and 223000321004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223000321001) 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, 18902050 + ... + 18913843.

It is an arithmetic number, because the mean of its divisors is an integer number (55759535703).

Almost surely, 2^223000321021 is an apocalyptic number.

It is an amenable number.

223000321021 is a deficient number, since it is larger than the sum of its proper divisors (37821791).

223000321021 is an equidigital number, since it uses as much as digits as its factorization.

223000321021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37821790.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 223000321021 its reverse (120123000322), we get a palindrome (343123321343).

The spelling of 223000321021 in words is "two hundred twenty-three billion, three hundred twenty-one thousand, twenty-one".