111111212213 has 4 divisors (see below), whose sum is σ = 111117881088. Its totient is φ = 111104543340.

The previous prime is 111111212209. The next prime is 111111212227. The reversal of 111111212213 is 312212111111.

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, and also an emirpimes, since its reverse is a distinct semiprime: 312212111111 = 19927 ⋅15667793.

It is a cyclic number.

It is not a de Polignac number, because 111111212213 - 2² = 111111212209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111111212191 and 111111212200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111111212413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3309383 + ... + 3342788.

It is an arithmetic number, because the mean of its divisors is an integer number (27779470272).

Almost surely, 2^111111212213 is an apocalyptic number.

It is an amenable number.

111111212213 is a deficient number, since it is larger than the sum of its proper divisors (6668875).

111111212213 is an equidigital number, since it uses as much as digits as its factorization.

111111212213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6668874.

The product of its digits is 24, while the sum is 17.

Adding to 111111212213 its reverse (312212111111), we get a palindrome (423323323324).

The spelling of 111111212213 in words is "one hundred eleven billion, one hundred eleven million, two hundred twelve thousand, two hundred thirteen".