11002020020081 has 2 divisors, whose sum is σ = 11002020020082. Its totient is φ = 11002020020080.

The previous prime is 11002020019999. The next prime is 11002020020099. The reversal of 11002020020081 is 18002002020011.

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., 6672224794225 + 4329795225856 = 2583065^2 + 2080816^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11002020020081 is a prime.

It is a super-2 number, since 2×11002020020081² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11002020920081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5501010010040 + 5501010010041.

It is an arithmetic number, because the mean of its divisors is an integer number (5501010010041).

Almost surely, 2^{11002020020081} is an apocalyptic number.

It is an amenable number.

11002020020081 is a deficient number, since it is larger than the sum of its proper divisors (1).

11002020020081 is an equidigital number, since it uses as much as digits as its factorization.

11002020020081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 11002020020081 its reverse (18002002020011), we get a palindrome (29004022040092).

The spelling of 11002020020081 in words is "eleven trillion, two billion, twenty million, twenty thousand, eighty-one".