11216421056 has 14 divisors (see below), whose sum is σ = 22257585660. Its totient is φ = 5608210496.

The previous prime is 11216421053. The next prime is 11216421071. The reversal of 11216421056 is 65012461211.

It is a super-3 number, since 3×11216421056³ (a number of 31 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (11216421053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 87628226 + ... + 87628353.

Almost surely, 2^11216421056 is an apocalyptic number.

11216421056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11216421056 is a deficient number, since it is larger than the sum of its proper divisors (11041164604).

11216421056 is an equidigital number, since it uses as much as digits as its factorization.

11216421056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175256591 (or 175256581 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

Adding to 11216421056 its reverse (65012461211), we get a palindrome (76228882267).

The spelling of 11216421056 in words is "eleven billion, two hundred sixteen million, four hundred twenty-one thousand, fifty-six".