11234577821 has 2 divisors, whose sum is σ = 11234577822. Its totient is φ = 11234577820.

The previous prime is 11234577787. The next prime is 11234577829. The reversal of 11234577821 is 12877543211.

11234577821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9057328900 + 2177248921 = 95170^2 + 46661^2 .

It is a cyclic number.

It is not a de Polignac number, because 11234577821 - 2¹⁰ = 11234576797 is a prime.

It is a super-2 number, since 2×11234577821² (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 (11234577829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5617288910 + 5617288911.

It is an arithmetic number, because the mean of its divisors is an integer number (5617288911).

Almost surely, 2^11234577821 is an apocalyptic number.

It is an amenable number.

11234577821 is a deficient number, since it is larger than the sum of its proper divisors (1).

11234577821 is an equidigital number, since it uses as much as digits as its factorization.

11234577821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94080, while the sum is 41.

The spelling of 11234577821 in words is "eleven billion, two hundred thirty-four million, five hundred seventy-seven thousand, eight hundred twenty-one".