111201231221 has 8 divisors (see below), whose sum is σ = 117230674944. Its totient is φ = 105324431760.

The previous prime is 111201231217. The next prime is 111201231233. The reversal of 111201231221 is 122132102111.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 111201231221 - 2² = 111201231217 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 111201231221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111201239221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38159570 + ... + 38162483.

It is an arithmetic number, because the mean of its divisors is an integer number (14653834368).

Almost surely, 2^111201231221 is an apocalyptic number.

It is an amenable number.

111201231221 is a deficient number, since it is larger than the sum of its proper divisors (6029443723).

111201231221 is an equidigital number, since it uses as much as digits as its factorization.

111201231221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76322131.

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

Adding to 111201231221 its reverse (122132102111), we get a palindrome (233333333332).

The spelling of 111201231221 in words is "one hundred eleven billion, two hundred one million, two hundred thirty-one thousand, two hundred twenty-one".