223221013021 has 8 divisors (see below), whose sum is σ = 225068193720. Its totient is φ = 221381419008.

The previous prime is 223221013013. The next prime is 223221013063. The reversal of 223221013021 is 120310122322.

223221013021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 193252556025 + 29968456996 = 439605^2 + 173114^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 223221013021 - 2³ = 223221013013 is a prime.

It is a super-3 number, since 3×223221013021³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 223221013021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223221013121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1837576 + ... + 1955281.

It is an arithmetic number, because the mean of its divisors is an integer number (28133524215).

Almost surely, 2^223221013021 is an apocalyptic number.

It is an amenable number.

223221013021 is a deficient number, since it is larger than the sum of its proper divisors (1847180699).

223221013021 is a wasteful number, since it uses less digits than its factorization.

223221013021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3793343.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 223221013021 its reverse (120310122322), we get a palindrome (343531135343).

The spelling of 223221013021 in words is "two hundred twenty-three billion, two hundred twenty-one million, thirteen thousand, twenty-one".