11021321989 has 2 divisors, whose sum is σ = 11021321990. Its totient is φ = 11021321988.

The previous prime is 11021321929. The next prime is 11021322149. The reversal of 11021321989 is 98912312011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10190902500 + 830419489 = 100950^2 + 28817^2 .

It is an emirp because it is prime and its reverse (98912312011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11021321989 - 2¹⁹ = 11020797701 is a prime.

It is a super-2 number, since 2×11021321989² (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 (11021321929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5510660994 + 5510660995.

It is an arithmetic number, because the mean of its divisors is an integer number (5510660995).

Almost surely, 2^11021321989 is an apocalyptic number.

It is an amenable number.

11021321989 is a deficient number, since it is larger than the sum of its proper divisors (1).

11021321989 is an equidigital number, since it uses as much as digits as its factorization.

11021321989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 37.

The spelling of 11021321989 in words is "eleven billion, twenty-one million, three hundred twenty-one thousand, nine hundred eighty-nine".