111022221211021 has 2 divisors, whose sum is σ = 111022221211022. Its totient is φ = 111022221211020.

The previous prime is 111022221210983. The next prime is 111022221211049. The reversal of 111022221211021 is 120112122220111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67265504418025 + 43756716792996 = 8201555^2 + 6614886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111022221211021 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111022221211021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111022221211091) 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, 55511110605510 + 55511110605511.

It is an arithmetic number, because the mean of its divisors is an integer number (55511110605511).

Almost surely, 2^{111022221211021} is an apocalyptic number.

It is an amenable number.

111022221211021 is a deficient number, since it is larger than the sum of its proper divisors (1).

111022221211021 is an equidigital number, since it uses as much as digits as its factorization.

111022221211021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 111022221211021 its reverse (120112122220111), we get a palindrome (231134343431132).

The spelling of 111022221211021 in words is "one hundred eleven trillion, twenty-two billion, two hundred twenty-one million, two hundred eleven thousand, twenty-one".