1121321233 has 6 divisors (see below), whose sum is σ = 1183444674. Its totient is φ = 1062303984.

The previous prime is 1121321219. The next prime is 1121321237. The reversal of 1121321233 is 3321231211.

It can be written as a sum of positive squares in only one way, i.e., 598878784 + 522442449 = 24472^2 + 22857^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1121321233 is a prime.

It is a super-2 number, since 2×1121321233² = 2514722615153280578, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1121321233.

It is not an unprimeable number, because it can be changed into a prime (1121321237) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1552716 + ... + 1553437.

It is an arithmetic number, because the mean of its divisors is an integer number (197240779).

Almost surely, 2^1121321233 is an apocalyptic number.

It is an amenable number.

1121321233 is a deficient number, since it is larger than the sum of its proper divisors (62123441).

1121321233 is an equidigital number, since it uses as much as digits as its factorization.

1121321233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3106191 (or 3106172 counting only the distinct ones).

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

The square root of 1121321233 is about 33486.1349367167. The cubic root of 1121321233 is about 1038.9070226687.

Adding to 1121321233 its reverse (3321231211), we get a palindrome (4442552444).

The spelling of 1121321233 in words is "one billion, one hundred twenty-one million, three hundred twenty-one thousand, two hundred thirty-three".