11221210109 has 2 divisors, whose sum is σ = 11221210110. Its totient is φ = 11221210108.

The previous prime is 11221210103. The next prime is 11221210127. The reversal of 11221210109 is 90101212211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7986103225 + 3235106884 = 89365^2 + 56878^2 .

It is a cyclic number.

It is not a de Polignac number, because 11221210109 - 2²⁴ = 11204432893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11221210103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610605054 + 5610605055.

It is an arithmetic number, because the mean of its divisors is an integer number (5610605055).

Almost surely, 2^11221210109 is an apocalyptic number.

It is an amenable number.

11221210109 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221210109 is an equidigital number, since it uses as much as digits as its factorization.

11221210109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 11221210109 in words is "eleven billion, two hundred twenty-one million, two hundred ten thousand, one hundred nine".