111110011222221 has 32 divisors (see below), whose sum is σ = 180422786288640. Its totient is φ = 67020256623600.

The previous prime is 111110011222153. The next prime is 111110011222271. The reversal of 111110011222221 is 122222110011111.

It is a happy number.

111110011222221 is a `hidden beast` number, since 1 + 111 + 100 + 11 + 222 + 221 = 666.

It is not a de Polignac number, because 111110011222221 - 2¹⁵ = 111110011189453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111110011222194 and 111110011222203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111110011222271) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 886448665 + ... + 886573998.

It is an arithmetic number, because the mean of its divisors is an integer number (5638212071520).

Almost surely, 2^{111110011222221} is an apocalyptic number.

111110011222221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111110011222221 is a deficient number, since it is larger than the sum of its proper divisors (69312775066419).

111110011222221 is a wasteful number, since it uses less digits than its factorization.

111110011222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1773022894 (or 1773022888 counting only the distinct ones).

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

Adding to 111110011222221 its reverse (122222110011111), we get a palindrome (233332121233332).

It can be divided in two parts, 1111100 and 11222221, that added together give a palindrome (12333321).

The spelling of 111110011222221 in words is "one hundred eleven trillion, one hundred ten billion, eleven million, two hundred twenty-two thousand, two hundred twenty-one".