223321020121 has 4 divisors (see below), whose sum is σ = 223322959332. Its totient is φ = 223319080912.

The previous prime is 223321020089. The next prime is 223321020173. The reversal of 223321020121 is 121020123322.

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 96930104896 + 126390915225 = 311336^2 + 355515^2 .

It is a cyclic number.

It is not a de Polignac number, because 223321020121 - 2⁵ = 223321020089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223321000121) 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, 785170 + ... + 1031083.

It is an arithmetic number, because the mean of its divisors is an integer number (55830739833).

Almost surely, 2^223321020121 is an apocalyptic number.

It is an amenable number.

223321020121 is a deficient number, since it is larger than the sum of its proper divisors (1939211).

223321020121 is a wasteful number, since it uses less digits than its factorization.

223321020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1939210.

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

Adding to 223321020121 its reverse (121020123322), we get a palindrome (344341143443).

The spelling of 223321020121 in words is "two hundred twenty-three billion, three hundred twenty-one million, twenty thousand, one hundred twenty-one".