113221231213 has 4 divisors (see below), whose sum is σ = 113222729340. Its totient is φ = 113219733088.

The previous prime is 113221231181. The next prime is 113221231219. The reversal of 113221231213 is 312132122311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 312132122311 = 9733 ⋅32069467.

It can be written as a sum of positive squares in 2 ways, for example, as 73290401284 + 39930829929 = 270722^2 + 199827^2 .

It is a cyclic number.

It is not a de Polignac number, because 113221231213 - 2⁵ = 113221231181 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 (113221231219) 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, 629320 + ... + 788977.

It is an arithmetic number, because the mean of its divisors is an integer number (28305682335).

Almost surely, 2^113221231213 is an apocalyptic number.

It is an amenable number.

113221231213 is a deficient number, since it is larger than the sum of its proper divisors (1498127).

113221231213 is an equidigital number, since it uses as much as digits as its factorization.

113221231213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1498126.

The product of its digits is 432, while the sum is 22.

Adding to 113221231213 its reverse (312132122311), we get a palindrome (425353353524).

The spelling of 113221231213 in words is "one hundred thirteen billion, two hundred twenty-one million, two hundred thirty-one thousand, two hundred thirteen".