1112201122181 has 2 divisors, whose sum is σ = 1112201122182. Its totient is φ = 1112201122180.

The previous prime is 1112201122163. The next prime is 1112201122229. The reversal of 1112201122181 is 1812211022111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 611172150625 + 501028971556 = 781775^2 + 707834^2 .

It is a cyclic number.

It is not a de Polignac number, because 1112201122181 - 2¹⁸ = 1112200860037 is a prime.

It is a super-2 number, since 2×1112201122181² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1112201122381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556100561090 + 556100561091.

It is an arithmetic number, because the mean of its divisors is an integer number (556100561091).

Almost surely, 2^{1112201122181} is an apocalyptic number.

It is an amenable number.

1112201122181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1112201122181 is an equidigital number, since it uses as much as digits as its factorization.

1112201122181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 23.

Adding to 1112201122181 its reverse (1812211022111), we get a palindrome (2924412144292).

The spelling of 1112201122181 in words is "one trillion, one hundred twelve billion, two hundred one million, one hundred twenty-two thousand, one hundred eighty-one".