1223331121 has 4 divisors (see below), whose sum is σ = 1224340852. Its totient is φ = 1222321392.

The previous prime is 1223331113. The next prime is 1223331133. The reversal of 1223331121 is 1211333221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1211333221 = 7 ⋅173047603.

It can be written as a sum of positive squares in 2 ways, for example, as 292410000 + 930921121 = 17100^2 + 30511^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223331121 - 2³ = 1223331113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1223331821) 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, 503046 + ... + 505471.

It is an arithmetic number, because the mean of its divisors is an integer number (306085213).

Almost surely, 2^1223331121 is an apocalyptic number.

It is an amenable number.

1223331121 is a deficient number, since it is larger than the sum of its proper divisors (1009731).

1223331121 is a wasteful number, since it uses less digits than its factorization.

1223331121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009730.

The product of its digits is 216, while the sum is 19.

The square root of 1223331121 is about 34976.1507459011. The cubic root of 1223331121 is about 1069.5013605221.

Adding to 1223331121 its reverse (1211333221), we get a palindrome (2434664342).

The spelling of 1223331121 in words is "one billion, two hundred twenty-three million, three hundred thirty-one thousand, one hundred twenty-one".