111112212022221 has 16 divisors (see below), whose sum is σ = 148277816818560. Its totient is φ = 74010724777920.

The previous prime is 111112212022219. The next prime is 111112212022241. The reversal of 111112212022221 is 122220212211111.

It is not a de Polignac number, because 111112212022221 - 2¹ = 111112212022219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111112212022241) 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, 23808256 + ... + 28090166.

It is an arithmetic number, because the mean of its divisors is an integer number (9267363551160).

Almost surely, 2^{111112212022221} is an apocalyptic number.

It is an amenable number.

111112212022221 is a deficient number, since it is larger than the sum of its proper divisors (37165604796339).

111112212022221 is a wasteful number, since it uses less digits than its factorization.

111112212022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4289396.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 111112212022221 its reverse (122220212211111), we get a palindrome (233332424233332).

The spelling of 111112212022221 in words is "one hundred eleven trillion, one hundred twelve billion, two hundred twelve million, twenty-two thousand, two hundred twenty-one".