111021122102021 has 4 divisors (see below), whose sum is σ = 111297982756044. Its totient is φ = 110744261448000.

The previous prime is 111021122101993. The next prime is 111021122102071. The reversal of 111021122102021 is 120201221120111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 77583700201921 + 33437421900100 = 8808161^2 + 5782510^2 .

It is a cyclic number.

It is not a de Polignac number, because 111021122102021 - 2⁶ = 111021122101957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111021122102071) 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 3 ways as a sum of consecutive naturals, for example, 138430326410 + ... + 138430327211.

It is an arithmetic number, because the mean of its divisors is an integer number (27824495689011).

Almost surely, 2^{111021122102021} is an apocalyptic number.

It is an amenable number.

111021122102021 is a deficient number, since it is larger than the sum of its proper divisors (276860654023).

111021122102021 is an equidigital number, since it uses as much as digits as its factorization.

111021122102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276860654022.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 111021122102021 its reverse (120201221120111), we get a palindrome (231222343222132).

The spelling of 111021122102021 in words is "one hundred eleven trillion, twenty-one billion, one hundred twenty-two million, one hundred two thousand, twenty-one".