11321220109 has 2 divisors, whose sum is σ = 11321220110. Its totient is φ = 11321220108.

The previous prime is 11321220101. The next prime is 11321220217. The reversal of 11321220109 is 90102212311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8733463209 + 2587756900 = 93453^2 + 50870^2 .

It is a cyclic number.

It is not a de Polignac number, because 11321220109 - 2³ = 11321220101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11321220109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11321220101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5660610054 + 5660610055.

It is an arithmetic number, because the mean of its divisors is an integer number (5660610055).

Almost surely, 2^11321220109 is an apocalyptic number.

It is an amenable number.

11321220109 is a deficient number, since it is larger than the sum of its proper divisors (1).

11321220109 is an equidigital number, since it uses as much as digits as its factorization.

11321220109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 22.

The spelling of 11321220109 in words is "eleven billion, three hundred twenty-one million, two hundred twenty thousand, one hundred nine".