223030030021 has 4 divisors (see below), whose sum is σ = 232726987872. Its totient is φ = 213333072172.

The previous prime is 223030030001. The next prime is 223030030033. The reversal of 223030030021 is 120030030322.

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 223030030021 - 2¹¹ = 223030027973 is a prime.

It is a super-2 number, since 2×223030030021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 223030029977 and 223030030004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223030030001) 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, 4848478891 + ... + 4848478936.

It is an arithmetic number, because the mean of its divisors is an integer number (58181746968).

Almost surely, 2^223030030021 is an apocalyptic number.

It is an amenable number.

223030030021 is a deficient number, since it is larger than the sum of its proper divisors (9696957851).

223030030021 is an equidigital number, since it uses as much as digits as its factorization.

223030030021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9696957850.

The product of its (nonzero) digits is 216, while the sum is 16.

Adding to 223030030021 its reverse (120030030322), we get a palindrome (343060060343).

The spelling of 223030030021 in words is "two hundred twenty-three billion, thirty million, thirty thousand, twenty-one".