111112222022221 has 8 divisors (see below), whose sum is σ = 128242677752064. Its totient is φ = 94296086581200.

The previous prime is 111112222022177. The next prime is 111112222022231. The reversal of 111112222022221 is 122220222211111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111112222022221 - 2⁹ = 111112222021709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111112222022192 and 111112222022201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111112222022231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78580071445 + ... + 78580072858.

It is an arithmetic number, because the mean of its divisors is an integer number (16030334719008).

Almost surely, 2^{111112222022221} is an apocalyptic number.

It is an amenable number.

111112222022221 is a deficient number, since it is larger than the sum of its proper divisors (17130455729843).

111112222022221 is a wasteful number, since it uses less digits than its factorization.

111112222022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157160144411.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 111112222022221 its reverse (122220222211111), we get a palindrome (233332444233332).

It can be divided in two parts, 1111 and 12222022221, that multiplied together give a palindrome (13578666687531).

The spelling of 111112222022221 in words is "one hundred eleven trillion, one hundred twelve billion, two hundred twenty-two million, twenty-two thousand, two hundred twenty-one".