11221220211209 has 8 divisors (see below), whose sum is σ = 11532319349760. Its totient is φ = 10912400187696.

The previous prime is 11221220211197. The next prime is 11221220211211. The reversal of 11221220211209 is 90211202212211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11221220211209 - 2¹⁶ = 11221220145673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11221220213209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 569768777 + ... + 569788470.

It is an arithmetic number, because the mean of its divisors is an integer number (1441539918720).

Almost surely, 2^{11221220211209} is an apocalyptic number.

It is an amenable number.

11221220211209 is a deficient number, since it is larger than the sum of its proper divisors (311099138551).

11221220211209 is a wasteful number, since it uses less digits than its factorization.

11221220211209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139557519.

The product of its (nonzero) digits is 576, while the sum is 26.

The spelling of 11221220211209 in words is "eleven trillion, two hundred twenty-one billion, two hundred twenty million, two hundred eleven thousand, two hundred nine".