111230211221 has 8 divisors (see below), whose sum is σ = 114366735000. Its totient is φ = 108113858560.

The previous prime is 111230211133. The next prime is 111230211227. The reversal of 111230211221 is 122112032111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5247408721 + 105982802500 = 72439^2 + 325550^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111230211221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111230211221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111230211227) 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, 5031596 + ... + 5053653.

It is an arithmetic number, because the mean of its divisors is an integer number (14295841875).

Almost surely, 2^111230211221 is an apocalyptic number.

It is an amenable number.

111230211221 is a deficient number, since it is larger than the sum of its proper divisors (3136523779).

111230211221 is a wasteful number, since it uses less digits than its factorization.

111230211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10085559.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 111230211221 its reverse (122112032111), we get a palindrome (233342243332).

The spelling of 111230211221 in words is "one hundred eleven billion, two hundred thirty million, two hundred eleven thousand, two hundred twenty-one".