111122020201121 has 2 divisors, whose sum is σ = 111122020201122. Its totient is φ = 111122020201120.

The previous prime is 111122020201091. The next prime is 111122020201123. The reversal of 111122020201121 is 121102020221111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110698595395600 + 423424805521 = 10521340^2 + 650711^2 .

It is a cyclic number.

It is not a de Polignac number, because 111122020201121 - 2¹⁰ = 111122020200097 is a prime.

Together with 111122020201123, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111122020201121.

It is not a weakly prime, because it can be changed into another prime (111122020201123) 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, 55561010100560 + 55561010100561.

It is an arithmetic number, because the mean of its divisors is an integer number (55561010100561).

Almost surely, 2^{111122020201121} is an apocalyptic number.

It is an amenable number.

111122020201121 is a deficient number, since it is larger than the sum of its proper divisors (1).

111122020201121 is an equidigital number, since it uses as much as digits as its factorization.

111122020201121 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 111122020201121 its reverse (121102020221111), we get a palindrome (232224040422232).

The spelling of 111122020201121 in words is "one hundred eleven trillion, one hundred twenty-two billion, twenty million, two hundred one thousand, one hundred twenty-one".