11178600821 has 2 divisors, whose sum is σ = 11178600822. Its totient is φ = 11178600820.

The previous prime is 11178600791. The next prime is 11178600857. The reversal of 11178600821 is 12800687111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10851388900 + 327211921 = 104170^2 + 18089^2 .

It is an emirp because it is prime and its reverse (12800687111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11178600821 - 2¹⁰ = 11178599797 is a prime.

It is a super-2 number, since 2×11178600821² (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 (11178606821) 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, 5589300410 + 5589300411.

It is an arithmetic number, because the mean of its divisors is an integer number (5589300411).

Almost surely, 2^11178600821 is an apocalyptic number.

It is an amenable number.

11178600821 is a deficient number, since it is larger than the sum of its proper divisors (1).

11178600821 is an equidigital number, since it uses as much as digits as its factorization.

11178600821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 35.

The spelling of 11178600821 in words is "eleven billion, one hundred seventy-eight million, six hundred thousand, eight hundred twenty-one".