11201311309 has 2 divisors, whose sum is σ = 11201311310. Its totient is φ = 11201311308.

The previous prime is 11201311307. The next prime is 11201311349. The reversal of 11201311309 is 90311310211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8987608809 + 2213702500 = 94803^2 + 47050^2 .

It is a cyclic number.

It is not a de Polignac number, because 11201311309 - 2¹ = 11201311307 is a prime.

It is a super-2 number, since 2×11201311309² (a number of 21 digits) contains 22 as substring.

Together with 11201311307, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 11201311309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11201311301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5600655654 + 5600655655.

It is an arithmetic number, because the mean of its divisors is an integer number (5600655655).

Almost surely, 2^11201311309 is an apocalyptic number.

It is an amenable number.

11201311309 is a deficient number, since it is larger than the sum of its proper divisors (1).

11201311309 is an equidigital number, since it uses as much as digits as its factorization.

11201311309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 22.

The spelling of 11201311309 in words is "eleven billion, two hundred one million, three hundred eleven thousand, three hundred nine".