111021020022221 has 8 divisors (see below), whose sum is σ = 115105120227000. Its totient is φ = 106953972428800.

The previous prime is 111021020022139. The next prime is 111021020022271. The reversal of 111021020022221 is 122220020120111.

It can be written as a sum of positive squares in 4 ways, for example, as 1201623746596 + 109819396275625 = 1096186^2 + 10479475^2 .

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-111021020022221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111021020022221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111021020022271) 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, 4263139580 + ... + 4263165621.

It is an arithmetic number, because the mean of its divisors is an integer number (14388140028375).

Almost surely, 2^{111021020022221} is an apocalyptic number.

It is an amenable number.

111021020022221 is a deficient number, since it is larger than the sum of its proper divisors (4084100204779).

111021020022221 is an equidigital number, since it uses as much as digits as its factorization.

111021020022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8526305679.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 111021020022221 its reverse (122220020120111), we get a palindrome (233241040142332).

The spelling of 111021020022221 in words is "one hundred eleven trillion, twenty-one billion, twenty million, twenty-two thousand, two hundred twenty-one".