11213111309 has 2 divisors, whose sum is σ = 11213111310. Its totient is φ = 11213111308.

The previous prime is 11213111297. The next prime is 11213111387. The reversal of 11213111309 is 90311131211.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10216762084 + 996349225 = 101078^2 + 31565^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11213111309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11213111909) 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, 5606555654 + 5606555655.

It is an arithmetic number, because the mean of its divisors is an integer number (5606555655).

Almost surely, 2^11213111309 is an apocalyptic number.

It is an amenable number.

11213111309 is a deficient number, since it is larger than the sum of its proper divisors (1).

11213111309 is an equidigital number, since it uses as much as digits as its factorization.

11213111309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 23.

The spelling of 11213111309 in words is "eleven billion, two hundred thirteen million, one hundred eleven thousand, three hundred nine".