111001020022021 has 2 divisors, whose sum is σ = 111001020022022. Its totient is φ = 111001020022020.

The previous prime is 111001020022019. The next prime is 111001020022049. The reversal of 111001020022021 is 120220020100111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78815084261796 + 32185935760225 = 8877786^2 + 5673265^2 .

It is a cyclic number.

It is not a de Polignac number, because 111001020022021 - 2¹ = 111001020022019 is a prime.

Together with 111001020022019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 111001020021992 and 111001020022010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111001020022091) 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 as a sum of consecutive naturals, namely, 55500510011010 + 55500510011011.

It is an arithmetic number, because the mean of its divisors is an integer number (55500510011011).

Almost surely, 2^{111001020022021} is an apocalyptic number.

It is an amenable number.

111001020022021 is a deficient number, since it is larger than the sum of its proper divisors (1).

111001020022021 is an equidigital number, since it uses as much as digits as its factorization.

111001020022021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 111001020022021 its reverse (120220020100111), we get a palindrome (231221040122132).

The spelling of 111001020022021 in words is "one hundred eleven trillion, one billion, twenty million, twenty-two thousand, twenty-one".