11000212009 has 2 divisors, whose sum is σ = 11000212010. Its totient is φ = 11000212008.

The previous prime is 11000212007. The next prime is 11000212031. The reversal of 11000212009 is 90021200011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9490656400 + 1509555609 = 97420^2 + 38853^2 .

It is an emirp because it is prime and its reverse (90021200011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11000212009 - 2¹ = 11000212007 is a prime.

Together with 11000212007, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 11000211983 and 11000212001.

It is not a weakly prime, because it can be changed into another prime (11000212007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5500106004 + 5500106005.

It is an arithmetic number, because the mean of its divisors is an integer number (5500106005).

Almost surely, 2^11000212009 is an apocalyptic number.

It is an amenable number.

11000212009 is a deficient number, since it is larger than the sum of its proper divisors (1).

11000212009 is an equidigital number, since it uses as much as digits as its factorization.

11000212009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 16.

The spelling of 11000212009 in words is "eleven billion, two hundred twelve thousand, nine".