110111211221 has 4 divisors (see below), whose sum is σ = 120121321344. Its totient is φ = 100101101100.

The previous prime is 110111211211. The next prime is 110111211227. The reversal of 110111211221 is 122112111011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 110111211221 - 2¹⁰ = 110111210197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 110111211196 and 110111211205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110111211227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5005055045 + ... + 5005055066.

It is an arithmetic number, because the mean of its divisors is an integer number (30030330336).

Almost surely, 2^110111211221 is an apocalyptic number.

110111211221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

110111211221 is a deficient number, since it is larger than the sum of its proper divisors (10010110123).

110111211221 is a wasteful number, since it uses less digits than its factorization.

110111211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10010110122.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 110111211221 its reverse (122112111011), we get a palindrome (232223322232).

The spelling of 110111211221 in words is "one hundred ten billion, one hundred eleven million, two hundred eleven thousand, two hundred twenty-one".