223121113 has 4 divisors (see below), whose sum is σ = 223151668. Its totient is φ = 223090560.

The previous prime is 223121081. The next prime is 223121117. The reversal of 223121113 is 311121322.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 101062809 + 122058304 = 10053^2 + 11048^2 .

It is a cyclic number.

It is not a de Polignac number, because 223121113 - 2⁵ = 223121081 is a prime.

It is a super-3 number, since 3×223121113³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223121117) 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, 2833 + ... + 21313.

It is an arithmetic number, because the mean of its divisors is an integer number (55787917).

Almost surely, 2^223121113 is an apocalyptic number.

It is an amenable number.

223121113 is a deficient number, since it is larger than the sum of its proper divisors (30555).

223121113 is a wasteful number, since it uses less digits than its factorization.

223121113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30554.

The product of its digits is 72, while the sum is 16.

The square root of 223121113 is about 14937.2391357975. The cubic root of 223121113 is about 606.5224620354.

Adding to 223121113 its reverse (311121322), we get a palindrome (534242435).

The spelling of 223121113 in words is "two hundred twenty-three million, one hundred twenty-one thousand, one hundred thirteen".