1121100211081 has 2 divisors, whose sum is σ = 1121100211082. Its totient is φ = 1121100211080.

The previous prime is 1121100211037. The next prime is 1121100211117. The reversal of 1121100211081 is 1801120011211.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1100275123600 + 20825087481 = 1048940^2 + 144309^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121100211081 - 2⁷ = 1121100210953 is a prime.

It is a super-3 number, since 3×1121100211081³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (1121100211181) 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, 560550105540 + 560550105541.

It is an arithmetic number, because the mean of its divisors is an integer number (560550105541).

Almost surely, 2^{1121100211081} is an apocalyptic number.

It is an amenable number.

1121100211081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121100211081 is an equidigital number, since it uses as much as digits as its factorization.

1121100211081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 1121100211081 its reverse (1801120011211), we get a palindrome (2922220222292).

The spelling of 1121100211081 in words is "one trillion, one hundred twenty-one billion, one hundred million, two hundred eleven thousand, eighty-one".