111112011022221 has 24 divisors (see below), whose sum is σ = 175460508815904. Its totient is φ = 67196414398560.

The previous prime is 111112011022219. The next prime is 111112011022247. The reversal of 111112011022221 is 122220110211111.

It is a happy number.

It is not a de Polignac number, because 111112011022221 - 2¹ = 111112011022219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111112011022194 and 111112011022203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111112011022121) 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, 1201606386 + ... + 1201698851.

It is an arithmetic number, because the mean of its divisors is an integer number (7310854533996).

Almost surely, 2^{111112011022221} is an apocalyptic number.

111112011022221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111112011022221 is a deficient number, since it is larger than the sum of its proper divisors (64348497793683).

111112011022221 is a wasteful number, since it uses less digits than its factorization.

111112011022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2403305721 (or 2403305718 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 111112011022221 its reverse (122220110211111), we get a palindrome (233332121233332).

The spelling of 111112011022221 in words is "one hundred eleven trillion, one hundred twelve billion, eleven million, twenty-two thousand, two hundred twenty-one".