1111012081 has 2 divisors, whose sum is σ = 1111012082. Its totient is φ = 1111012080.

The previous prime is 1111012037. The next prime is 1111012087. The reversal of 1111012081 is 1802101111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 788486400 + 322525681 = 28080^2 + 17959^2 .

It is an emirp because it is prime and its reverse (1802101111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1111012081 - 2⁹ = 1111011569 is a prime.

It is a super-2 number, since 2×1111012081² = 2468695688255901122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1111012087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555506040 + 555506041.

It is an arithmetic number, because the mean of its divisors is an integer number (555506041).

Almost surely, 2^1111012081 is an apocalyptic number.

It is an amenable number.

1111012081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111012081 is an equidigital number, since it uses as much as digits as its factorization.

1111012081 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 16.

The square root of 1111012081 is about 33331.8478485667. The cubic root of 1111012081 is about 1035.7133967790.

Adding to 1111012081 its reverse (1802101111), we get a palindrome (2913113192).

The spelling of 1111012081 in words is "one billion, one hundred eleven million, twelve thousand, eighty-one".