23221101209 has 2 divisors, whose sum is σ = 23221101210. Its totient is φ = 23221101208.

The previous prime is 23221101203. The next prime is 23221101217. The reversal of 23221101209 is 90210112232.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13035245584 + 10185855625 = 114172^2 + 100925^2 .

It is a cyclic number.

It is not a de Polignac number, because 23221101209 - 2⁸ = 23221100953 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (23221101203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11610550604 + 11610550605.

It is an arithmetic number, because the mean of its divisors is an integer number (11610550605).

Almost surely, 2^23221101209 is an apocalyptic number.

It is an amenable number.

23221101209 is a deficient number, since it is larger than the sum of its proper divisors (1).

23221101209 is an equidigital number, since it uses as much as digits as its factorization.

23221101209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The spelling of 23221101209 in words is "twenty-three billion, two hundred twenty-one million, one hundred one thousand, two hundred nine".