1111200001181 has 2 divisors, whose sum is σ = 1111200001182. Its totient is φ = 1111200001180.

The previous prime is 1111200001147. The next prime is 1111200001237. The reversal of 1111200001181 is 1811000021111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1074610049956 + 36589951225 = 1036634^2 + 191285^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111200001181 - 2⁶ = 1111200001117 is a prime.

It is a super-2 number, since 2×1111200001181² (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 (1111200501181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555600000590 + 555600000591.

It is an arithmetic number, because the mean of its divisors is an integer number (555600000591).

Almost surely, 2^{1111200001181} is an apocalyptic number.

It is an amenable number.

1111200001181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111200001181 is an equidigital number, since it uses as much as digits as its factorization.

1111200001181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 1111200001181 its reverse (1811000021111), we get a palindrome (2922200022292).

The spelling of 1111200001181 in words is "one trillion, one hundred eleven billion, two hundred million, one thousand, one hundred eighty-one".