111122210020121 has 2 divisors, whose sum is σ = 111122210020122. Its totient is φ = 111122210020120.

The previous prime is 111122210020097. The next prime is 111122210020127. The reversal of 111122210020121 is 121020012221111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109372608594496 + 1749601425625 = 10458136^2 + 1322725^2 .

It is an emirp because it is prime and its reverse (121020012221111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111122210020121 - 2⁶ = 111122210020057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111122210020121.

It is not a weakly prime, because it can be changed into another prime (111122210020127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55561105010060 + 55561105010061.

It is an arithmetic number, because the mean of its divisors is an integer number (55561105010061).

Almost surely, 2^{111122210020121} is an apocalyptic number.

It is an amenable number.

111122210020121 is a deficient number, since it is larger than the sum of its proper divisors (1).

111122210020121 is an equidigital number, since it uses as much as digits as its factorization.

111122210020121 is an evil number, because the sum of its binary digits is even.

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

Adding to 111122210020121 its reverse (121020012221111), we get a palindrome (232142222241232).

The spelling of 111122210020121 in words is "one hundred eleven trillion, one hundred twenty-two billion, two hundred ten million, twenty thousand, one hundred twenty-one".