223031221121 has 8 divisors (see below), whose sum is σ = 228511322088. Its totient is φ = 217553040000.

The previous prime is 223031221109. The next prime is 223031221159. The reversal of 223031221121 is 121122130322.

It can be written as a sum of positive squares in 4 ways, for example, as 60351292225 + 162679928896 = 245665^2 + 403336^2 .

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 223031221121 - 2⁶ = 223031221057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 223031221093 and 223031221102.

It is not an unprimeable number, because it can be changed into a prime (223031221921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243350 + ... + 710831.

It is an arithmetic number, because the mean of its divisors is an integer number (28563915261).

Almost surely, 2^223031221121 is an apocalyptic number.

It is an amenable number.

223031221121 is a deficient number, since it is larger than the sum of its proper divisors (5480100967).

223031221121 is an equidigital number, since it uses as much as digits as its factorization.

223031221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959923.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 223031221121 its reverse (121122130322), we get a palindrome (344153351443).

The spelling of 223031221121 in words is "two hundred twenty-three billion, thirty-one million, two hundred twenty-one thousand, one hundred twenty-one".