111101213 has 4 divisors (see below), whose sum is σ = 111142908. Its totient is φ = 111059520.

The previous prime is 111101173. The next prime is 111101311. The reversal of 111101213 is 312101111.

It is a happy number.

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 41512249 + 69588964 = 6443^2 + 8342^2 .

It is a cyclic number.

It is not a de Polignac number, because 111101213 - 2¹² = 111097117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111101194 and 111101203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111131213) 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, 16556 + ... + 22277.

It is an arithmetic number, because the mean of its divisors is an integer number (27785727).

Almost surely, 2^111101213 is an apocalyptic number.

It is an amenable number.

111101213 is a deficient number, since it is larger than the sum of its proper divisors (41695).

111101213 is an equidigital number, since it uses as much as digits as its factorization.

111101213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41694.

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 111101213 is about 10540.4560148032. The cubic root of 111101213 is about 480.7355807987.

Adding to 111101213 its reverse (312101111), we get a palindrome (423202324).

The spelling of 111101213 in words is "one hundred eleven million, one hundred one thousand, two hundred thirteen".