11221192909 has 2 divisors, whose sum is σ = 11221192910. Its totient is φ = 11221192908.

The previous prime is 11221192901. The next prime is 11221192937. The reversal of 11221192909 is 90929112211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10583882884 + 637310025 = 102878^2 + 25245^2 .

It is a cyclic number.

It is not a de Polignac number, because 11221192909 - 2³ = 11221192901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11221192901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610596454 + 5610596455.

It is an arithmetic number, because the mean of its divisors is an integer number (5610596455).

Almost surely, 2^11221192909 is an apocalyptic number.

It is an amenable number.

11221192909 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221192909 is an equidigital number, since it uses as much as digits as its factorization.

11221192909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 37.

It can be divided in two parts, 112211 and 92909, that added together give a triangular number (205120 = T₆₄₀).

The spelling of 11221192909 in words is "eleven billion, two hundred twenty-one million, one hundred ninety-two thousand, nine hundred nine".