110111212221 has 16 divisors (see below), whose sum is σ = 154552688640. Its totient is φ = 69539137200.

The previous prime is 110111212219. The next prime is 110111212229. The reversal of 110111212221 is 122212111011.

It is a happy number.

It is not a de Polignac number, because 110111212221 - 2¹ = 110111212219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 110111212221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110111212229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 888196 + ... + 1004546.

It is an arithmetic number, because the mean of its divisors is an integer number (9659543040).

Almost surely, 2^110111212221 is an apocalyptic number.

It is an amenable number.

110111212221 is a deficient number, since it is larger than the sum of its proper divisors (44441476419).

110111212221 is a wasteful number, since it uses less digits than its factorization.

110111212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132976.

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

Adding to 110111212221 its reverse (122212111011), we get a palindrome (232323323232).

The spelling of 110111212221 in words is "one hundred ten billion, one hundred eleven million, two hundred twelve thousand, two hundred twenty-one".