1123121312233 has 4 divisors (see below), whose sum is σ = 1128068983440. Its totient is φ = 1118173641028.

The previous prime is 1123121312227. The next prime is 1123121312249. The reversal of 1123121312233 is 3322131213211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1123121312233 - 2²¹ = 1123119215081 is a prime.

It is a super-2 number, since 2×1123121312233² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1123121312198 and 1123121312207.

It is not an unprimeable number, because it can be changed into a prime (1123121319233) 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, 2473835263 + ... + 2473835716.

It is an arithmetic number, because the mean of its divisors is an integer number (282017245860).

Almost surely, 2^{1123121312233} is an apocalyptic number.

It is an amenable number.

1123121312233 is a deficient number, since it is larger than the sum of its proper divisors (4947671207).

1123121312233 is an equidigital number, since it uses as much as digits as its factorization.

1123121312233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4947671206.

The product of its digits is 1296, while the sum is 25.

Adding to 1123121312233 its reverse (3322131213211), we get a palindrome (4445252525444).

The spelling of 1123121312233 in words is "one trillion, one hundred twenty-three billion, one hundred twenty-one million, three hundred twelve thousand, two hundred thirty-three".