111120022122121 has 2 divisors, whose sum is σ = 111120022122122. Its totient is φ = 111120022122120.

The previous prime is 111120022122101. The next prime is 111120022122227. The reversal of 111120022122121 is 121221220021111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87163510099600 + 23956512022521 = 9336140^2 + 4894539^2 .

It is a cyclic number.

It is not a de Polignac number, because 111120022122121 - 2¹⁹ = 111120021597833 is a prime.

It is not a weakly prime, because it can be changed into another prime (111120022122101) 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, 55560011061060 + 55560011061061.

It is an arithmetic number, because the mean of its divisors is an integer number (55560011061061).

Almost surely, 2^{111120022122121} is an apocalyptic number.

It is an amenable number.

111120022122121 is a deficient number, since it is larger than the sum of its proper divisors (1).

111120022122121 is an equidigital number, since it uses as much as digits as its factorization.

111120022122121 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 111120022122121 its reverse (121221220021111), we get a palindrome (232341242143232).

The spelling of 111120022122121 in words is "one hundred eleven trillion, one hundred twenty billion, twenty-two million, one hundred twenty-two thousand, one hundred twenty-one".