11418851921 has 2 divisors, whose sum is σ = 11418851922. Its totient is φ = 11418851920.

The previous prime is 11418851911. The next prime is 11418851999. The reversal of 11418851921 is 12915881411.

11418851921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6393601600 + 5025250321 = 79960^2 + 70889^2 .

It is an emirp because it is prime and its reverse (12915881411) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11418851921 is a prime.

It is not a weakly prime, because it can be changed into another prime (11418851911) 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, 5709425960 + 5709425961.

It is an arithmetic number, because the mean of its divisors is an integer number (5709425961).

Almost surely, 2^11418851921 is an apocalyptic number.

It is an amenable number.

11418851921 is a deficient number, since it is larger than the sum of its proper divisors (1).

11418851921 is an equidigital number, since it uses as much as digits as its factorization.

11418851921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23040, while the sum is 41.

The spelling of 11418851921 in words is "eleven billion, four hundred eighteen million, eight hundred fifty-one thousand, nine hundred twenty-one".