11031020081 has 2 divisors, whose sum is σ = 11031020082. Its totient is φ = 11031020080.

The previous prime is 11031020059. The next prime is 11031020107. The reversal of 11031020081 is 18002013011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9811893025 + 1219127056 = 99055^2 + 34916^2 .

It is a cyclic number.

It is not a de Polignac number, because 11031020081 - 2¹⁰ = 11031019057 is a prime.

It is a super-2 number, since 2×11031020081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11031020051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5515510040 + 5515510041.

It is an arithmetic number, because the mean of its divisors is an integer number (5515510041).

Almost surely, 2^11031020081 is an apocalyptic number.

It is an amenable number.

11031020081 is a deficient number, since it is larger than the sum of its proper divisors (1).

11031020081 is an equidigital number, since it uses as much as digits as its factorization.

11031020081 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 17.

Adding to 11031020081 its reverse (18002013011), we get a palindrome (29033033092).

The spelling of 11031020081 in words is "eleven billion, thirty-one million, twenty thousand, eighty-one".