111100117221 has 24 divisors (see below), whose sum is σ = 170935337664. Its totient is φ = 69292437120.

The previous prime is 111100117211. The next prime is 111100117223. The reversal of 111100117221 is 122711001111.

It is not a de Polignac number, because 111100117221 - 2¹⁵ = 111100084453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111100117194 and 111100117203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111100117223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2148535 + ... + 2199636.

It is an arithmetic number, because the mean of its divisors is an integer number (7122305736).

Almost surely, 2^111100117221 is an apocalyptic number.

It is an amenable number.

111100117221 is a deficient number, since it is larger than the sum of its proper divisors (59835220443).

111100117221 is a wasteful number, since it uses less digits than its factorization.

111100117221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4348361 (or 4348358 counting only the distinct ones).

The product of its (nonzero) digits is 28, while the sum is 18.

Adding to 111100117221 its reverse (122711001111), we get a palindrome (233811118332).

The spelling of 111100117221 in words is "one hundred eleven billion, one hundred million, one hundred seventeen thousand, two hundred twenty-one".