111201112221 has 8 divisors (see below), whose sum is σ = 148269896544. Its totient is φ = 74133201360.

The previous prime is 111201112201. The next prime is 111201112313. The reversal of 111201112221 is 122211102111.

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 111201112221 - 2³¹ = 109053628573 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111201112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111201112201) 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, 185295 + ... + 506691.

It is an arithmetic number, because the mean of its divisors is an integer number (18533737068).

Almost surely, 2^111201112221 is an apocalyptic number.

It is an amenable number.

111201112221 is a deficient number, since it is larger than the sum of its proper divisors (37068784323).

111201112221 is a wasteful number, since it uses less digits than its factorization.

111201112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436731.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 111201112221 its reverse (122211102111), we get a palindrome (233412214332).

The spelling of 111201112221 in words is "one hundred eleven billion, two hundred one million, one hundred twelve thousand, two hundred twenty-one".