22101211009 has 2 divisors, whose sum is σ = 22101211010. Its totient is φ = 22101211008.

The previous prime is 22101210997. The next prime is 22101211019. The reversal of 22101211009 is 90011210122.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20691959409 + 1409251600 = 143847^2 + 37540^2 .

It is a cyclic number.

It is not a de Polignac number, because 22101211009 - 2⁵ = 22101210977 is a prime.

It is not a weakly prime, because it can be changed into another prime (22101211019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11050605504 + 11050605505.

It is an arithmetic number, because the mean of its divisors is an integer number (11050605505).

Almost surely, 2^22101211009 is an apocalyptic number.

It is an amenable number.

22101211009 is a deficient number, since it is larger than the sum of its proper divisors (1).

22101211009 is an equidigital number, since it uses as much as digits as its factorization.

22101211009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 22101211009 in words is "twenty-two billion, one hundred one million, two hundred eleven thousand, nine".