1112213213 has 4 divisors (see below), whose sum is σ = 1112345628. Its totient is φ = 1112080800.

The previous prime is 1112213161. The next prime is 1112213237. The reversal of 1112213213 is 3123122111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3123122111 = 4751 ⋅657361.

It can be written as a sum of positive squares in 2 ways, for example, as 831918649 + 280294564 = 28843^2 + 16742^2 .

It is a cyclic number.

It is not a de Polignac number, because 1112213213 - 2⁸ = 1112212957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1112213191 and 1112213200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1112213243) 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, 52688 + ... + 70713.

It is an arithmetic number, because the mean of its divisors is an integer number (278086407).

Almost surely, 2^1112213213 is an apocalyptic number.

It is an amenable number.

1112213213 is a deficient number, since it is larger than the sum of its proper divisors (132415).

1112213213 is an equidigital number, since it uses as much as digits as its factorization.

1112213213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132414.

The product of its digits is 72, while the sum is 17.

The square root of 1112213213 is about 33349.8607643270. The cubic root of 1112213213 is about 1036.0865041710.

Adding to 1112213213 its reverse (3123122111), we get a palindrome (4235335324).

The spelling of 1112213213 in words is "one billion, one hundred twelve million, two hundred thirteen thousand, two hundred thirteen".