11221210209 has 64 divisors (see below), whose sum is σ = 17418240000. Its totient is φ = 6354469440.

The previous prime is 11221210199. The next prime is 11221210277. The reversal of 11221210209 is 90201212211.

It is not a de Polignac number, because 11221210209 - 2⁴ = 11221210193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11221210109) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 17343124 + ... + 17343770.

It is an arithmetic number, because the mean of its divisors is an integer number (272160000).

Almost surely, 2^11221210209 is an apocalyptic number.

11221210209 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

11221210209 is a deficient number, since it is larger than the sum of its proper divisors (6197029791).

11221210209 is a wasteful number, since it uses less digits than its factorization.

11221210209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018.

The product of its (nonzero) digits is 144, while the sum is 21.

The spelling of 11221210209 in words is "eleven billion, two hundred twenty-one million, two hundred ten thousand, two hundred nine".