111222011102021 has 2 divisors, whose sum is σ = 111222011102022. Its totient is φ = 111222011102020.

The previous prime is 111222011102009. The next prime is 111222011102051. The reversal of 111222011102021 is 120201110222111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60211547352100 + 51010463749921 = 7759610^2 + 7142161^2 .

It is a cyclic number.

It is not a de Polignac number, because 111222011102021 - 2²² = 111222006907717 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111222011102051) 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, 55611005551010 + 55611005551011.

It is an arithmetic number, because the mean of its divisors is an integer number (55611005551011).

Almost surely, 2^{111222011102021} is an apocalyptic number.

It is an amenable number.

111222011102021 is a deficient number, since it is larger than the sum of its proper divisors (1).

111222011102021 is an equidigital number, since it uses as much as digits as its factorization.

111222011102021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 111222011102021 its reverse (120201110222111), we get a palindrome (231423121324132).

The spelling of 111222011102021 in words is "one hundred eleven trillion, two hundred twenty-two billion, eleven million, one hundred two thousand, twenty-one".