1123533443121 has 16 divisors (see below), whose sum is σ = 1538986776000. Its totient is φ = 728563163328.

The previous prime is 1123533443111. The next prime is 1123533443209. The reversal of 1123533443121 is 1213443353211.

It is not a de Polignac number, because 1123533443121 - 2⁶ = 1123533443057 is a prime.

It is a super-2 number, since 2×1123533443121² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1123533443111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1117171 + ... + 1869528.

It is an arithmetic number, because the mean of its divisors is an integer number (96186673500).

Almost surely, 2^{1123533443121} is an apocalyptic number.

It is an amenable number.

1123533443121 is a deficient number, since it is larger than the sum of its proper divisors (415453332879).

1123533443121 is a wasteful number, since it uses less digits than its factorization.

1123533443121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2990128.

The product of its digits is 25920, while the sum is 33.

Adding to 1123533443121 its reverse (1213443353211), we get a palindrome (2336976796332).

The spelling of 1123533443121 in words is "one trillion, one hundred twenty-three billion, five hundred thirty-three million, four hundred forty-three thousand, one hundred twenty-one".