11332020181 has 2 divisors, whose sum is σ = 11332020182. Its totient is φ = 11332020180.

The previous prime is 11332020173. The next prime is 11332020187. The reversal of 11332020181 is 18102023311.

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., 6838463025 + 4493557156 = 82695^2 + 67034^2 .

It is a cyclic number.

It is not a de Polignac number, because 11332020181 - 2³ = 11332020173 is a prime.

It is a super-2 number, since 2×11332020181² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11332020187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5666010090 + 5666010091.

It is an arithmetic number, because the mean of its divisors is an integer number (5666010091).

Almost surely, 2^11332020181 is an apocalyptic number.

It is an amenable number.

11332020181 is a deficient number, since it is larger than the sum of its proper divisors (1).

11332020181 is an equidigital number, since it uses as much as digits as its factorization.

11332020181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 11332020181 its reverse (18102023311), we get a palindrome (29434043492).

The spelling of 11332020181 in words is "eleven billion, three hundred thirty-two million, twenty thousand, one hundred eighty-one".