111214105021 has 2 divisors, whose sum is σ = 111214105022. Its totient is φ = 111214105020.

The previous prime is 111214105019. The next prime is 111214105039. The reversal of 111214105021 is 120501412111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78313224025 + 32900880996 = 279845^2 + 181386^2 .

It is a cyclic number.

It is not a de Polignac number, because 111214105021 - 2¹ = 111214105019 is a prime.

Together with 111214105019, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 111214105021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111214105001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55607052510 + 55607052511.

It is an arithmetic number, because the mean of its divisors is an integer number (55607052511).

Almost surely, 2^111214105021 is an apocalyptic number.

It is an amenable number.

111214105021 is a deficient number, since it is larger than the sum of its proper divisors (1).

111214105021 is an equidigital number, since it uses as much as digits as its factorization.

111214105021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 19.

Adding to 111214105021 its reverse (120501412111), we get a palindrome (231715517132).

The spelling of 111214105021 in words is "one hundred eleven billion, two hundred fourteen million, one hundred five thousand, twenty-one".