111122222021201 has 2 divisors, whose sum is σ = 111122222021202. Its totient is φ = 111122222021200.

The previous prime is 111122222021141. The next prime is 111122222021231. The reversal of 111122222021201 is 102120222221111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95140808620225 + 15981413400976 = 9754015^2 + 3997676^2 .

It is an emirp because it is prime and its reverse (102120222221111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111122222021201 is a prime.

It is not a weakly prime, because it can be changed into another prime (111122222021231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55561111010600 + 55561111010601.

It is an arithmetic number, because the mean of its divisors is an integer number (55561111010601).

Almost surely, 2^{111122222021201} is an apocalyptic number.

It is an amenable number.

111122222021201 is a deficient number, since it is larger than the sum of its proper divisors (1).

111122222021201 is an equidigital number, since it uses as much as digits as its factorization.

111122222021201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 111122222021201 its reverse (102120222221111), we get a palindrome (213242444242312).

The spelling of 111122222021201 in words is "one hundred eleven trillion, one hundred twenty-two billion, two hundred twenty-two million, twenty-one thousand, two hundred one".