111020222022221 has 8 divisors (see below), whose sum is σ = 111081332820024. Its totient is φ = 110959120235520.

The previous prime is 111020222022187. The next prime is 111020222022247. The reversal of 111020222022221 is 122220222020111.

It can be written as a sum of positive squares in 4 ways, for example, as 20341949142025 + 90678272880196 = 4510205^2 + 9522514^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111020222022221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 111020222022193 and 111020222022202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111020222022251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22469381 + ... + 26961333.

It is an arithmetic number, because the mean of its divisors is an integer number (13885166602503).

Almost surely, 2^{111020222022221} is an apocalyptic number.

It is an amenable number.

111020222022221 is a deficient number, since it is larger than the sum of its proper divisors (61110797803).

111020222022221 is a wasteful number, since it uses less digits than its factorization.

111020222022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4505551.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 111020222022221 its reverse (122220222020111), we get a palindrome (233240444042332).

The spelling of 111020222022221 in words is "one hundred eleven trillion, twenty billion, two hundred twenty-two million, twenty-two thousand, two hundred twenty-one".