1123452135205 has 4 divisors (see below), whose sum is σ = 1348142562252. Its totient is φ = 898761708160.

The previous prime is 1123452135203. The next prime is 1123452135217. The reversal of 1123452135205 is 5025312543211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 856368861604 + 267083273601 = 925402^2 + 516801^2 .

It is not a de Polignac number, because 1123452135205 - 2¹ = 1123452135203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123452135203) 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, 112345213516 + ... + 112345213525.

It is an arithmetic number, because the mean of its divisors is an integer number (337035640563).

Almost surely, 2^{1123452135205} is an apocalyptic number.

It is an amenable number.

1123452135205 is a deficient number, since it is larger than the sum of its proper divisors (224690427047).

1123452135205 is an equidigital number, since it uses as much as digits as its factorization.

1123452135205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224690427046.

The product of its (nonzero) digits is 36000, while the sum is 34.

Adding to 1123452135205 its reverse (5025312543211), we get a palindrome (6148764678416).

The spelling of 1123452135205 in words is "one trillion, one hundred twenty-three billion, four hundred fifty-two million, one hundred thirty-five thousand, two hundred five".