11221121867 has 2 divisors, whose sum is σ = 11221121868. Its totient is φ = 11221121866.

The previous prime is 11221121861. The next prime is 11221121903. The reversal of 11221121867 is 76812112211.

It is a weak prime.

It is an emirp because it is prime and its reverse (76812112211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11221121867 - 2¹⁶ = 11221056331 is a prime.

It is not a weakly prime, because it can be changed into another prime (11221121861) 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, 5610560933 + 5610560934.

It is an arithmetic number, because the mean of its divisors is an integer number (5610560934).

Almost surely, 2^11221121867 is an apocalyptic number.

11221121867 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221121867 is an equidigital number, since it uses as much as digits as its factorization.

11221121867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2688, while the sum is 32.

The spelling of 11221121867 in words is "eleven billion, two hundred twenty-one million, one hundred twenty-one thousand, eight hundred sixty-seven".