11112031081 has 2 divisors, whose sum is σ = 11112031082. Its totient is φ = 11112031080.

The previous prime is 11112031013. The next prime is 11112031111. The reversal of 11112031081 is 18013021111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6153618025 + 4958413056 = 78445^2 + 70416^2 .

It is a cyclic number.

It is not a de Polignac number, because 11112031081 - 2²¹ = 11109933929 is a prime.

It is a super-2 number, since 2×11112031081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11112041081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5556015540 + 5556015541.

It is an arithmetic number, because the mean of its divisors is an integer number (5556015541).

Almost surely, 2^11112031081 is an apocalyptic number.

It is an amenable number.

11112031081 is a deficient number, since it is larger than the sum of its proper divisors (1).

11112031081 is an equidigital number, since it uses as much as digits as its factorization.

11112031081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 11112031081 its reverse (18013021111), we get a palindrome (29125052192).

The spelling of 11112031081 in words is "eleven billion, one hundred twelve million, thirty-one thousand, eighty-one".