1123221121 has 8 divisors (see below), whose sum is σ = 1245420288. Its totient is φ = 1004370000.

The previous prime is 1123221097. The next prime is 1123221133. The reversal of 1123221121 is 1211223211.

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 1123221121 - 2¹¹ = 1123219073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1123221095 and 1123221104.

It is not an unprimeable number, because it can be changed into a prime (1123221221) 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, 836305 + ... + 837646.

It is an arithmetic number, because the mean of its divisors is an integer number (155677536).

Almost surely, 2^1123221121 is an apocalyptic number.

1123221121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1123221121 is a deficient number, since it is larger than the sum of its proper divisors (122199167).

1123221121 is a wasteful number, since it uses less digits than its factorization.

1123221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1674023.

The product of its digits is 48, while the sum is 16.

The square root of 1123221121 is about 33514.4912090278. The cubic root of 1123221121 is about 1039.4934419794.

Adding to 1123221121 its reverse (1211223211), we get a palindrome (2334444332).

The spelling of 1123221121 in words is "one billion, one hundred twenty-three million, two hundred twenty-one thousand, one hundred twenty-one".