111231213 has 8 divisors (see below), whose sum is σ = 152316768. Its totient is φ = 72149904.

The previous prime is 111231209. The next prime is 111231233. The reversal of 111231213 is 312132111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111231213 - 2² = 111231209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111231192 and 111231201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111231233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 500931 + ... + 501152.

It is an arithmetic number, because the mean of its divisors is an integer number (19039596).

Almost surely, 2^111231213 is an apocalyptic number.

It is an amenable number.

111231213 is a deficient number, since it is larger than the sum of its proper divisors (41085555).

111231213 is a wasteful number, since it uses less digits than its factorization.

111231213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002123.

The product of its digits is 36, while the sum is 15.

The square root of 111231213 is about 10546.6209280508. The cubic root of 111231213 is about 480.9230112932.

Adding to 111231213 its reverse (312132111), we get a palindrome (423363324).

The spelling of 111231213 in words is "one hundred eleven million, two hundred thirty-one thousand, two hundred thirteen".