111001121100221 has 16 divisors (see below), whose sum is σ = 121155590578176. Its totient is φ = 100857236550000.

The previous prime is 111001121100173. The next prime is 111001121100307. The reversal of 111001121100221 is 122001121100111.

It is a cyclic number.

It is not a de Polignac number, because 111001121100221 - 2³⁰ = 111000047358397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111001121100196 and 111001121100205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111001121120221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 268515116 + ... + 268928186.

It is an arithmetic number, because the mean of its divisors is an integer number (7572224411136).

Almost surely, 2^{111001121100221} is an apocalyptic number.

111001121100221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111001121100221 is a deficient number, since it is larger than the sum of its proper divisors (10154469477955).

111001121100221 is a wasteful number, since it uses less digits than its factorization.

111001121100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425824.

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

Adding to 111001121100221 its reverse (122001121100111), we get a palindrome (233002242200332).

The spelling of 111001121100221 in words is "one hundred eleven trillion, one billion, one hundred twenty-one million, one hundred thousand, two hundred twenty-one".