23220112009 has 2 divisors, whose sum is σ = 23220112010. Its totient is φ = 23220112008.

The previous prime is 23220111991. The next prime is 23220112037. The reversal of 23220112009 is 90021102232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22341878784 + 878233225 = 149472^2 + 29635^2 .

It is a cyclic number.

It is not a de Polignac number, because 23220112009 - 2¹¹ = 23220109961 is a prime.

It is not a weakly prime, because it can be changed into another prime (23220112309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11610056004 + 11610056005.

It is an arithmetic number, because the mean of its divisors is an integer number (11610056005).

Almost surely, 2^23220112009 is an apocalyptic number.

It is an amenable number.

23220112009 is a deficient number, since it is larger than the sum of its proper divisors (1).

23220112009 is an equidigital number, since it uses as much as digits as its factorization.

23220112009 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 22.

The spelling of 23220112009 in words is "twenty-three billion, two hundred twenty million, one hundred twelve thousand, nine".