223221121 has 4 divisors (see below), whose sum is σ = 223441200. Its totient is φ = 223001044.

The previous prime is 223221109. The next prime is 223221133. The reversal of 223221121 is 121122322.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 121122322 = 2 ⋅60561161.

It is an interprime number because it is at equal distance from previous prime (223221109) and next prime (223221133).

It is a cyclic number.

It is not a de Polignac number, because 223221121 - 2²⁵ = 189666689 is a prime.

It is a super-3 number, since 3×223221121³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 223221095 and 223221104.

It is not an unprimeable number, because it can be changed into a prime (223221151) 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, 108511 + ... + 110548.

It is an arithmetic number, because the mean of its divisors is an integer number (55860300).

Almost surely, 2^223221121 is an apocalyptic number.

It is an amenable number.

223221121 is a deficient number, since it is larger than the sum of its proper divisors (220079).

223221121 is a wasteful number, since it uses less digits than its factorization.

223221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220078.

The product of its digits is 96, while the sum is 16.

The square root of 223221121 is about 14940.5863673418. The cubic root of 223221121 is about 606.6130675922.

Adding to 223221121 its reverse (121122322), we get a palindrome (344343443).

The spelling of 223221121 in words is "two hundred twenty-three million, two hundred twenty-one thousand, one hundred twenty-one".