23201311009 has 2 divisors, whose sum is σ = 23201311010. Its totient is φ = 23201311008.

The previous prime is 23201310991. The next prime is 23201311079. The reversal of 23201311009 is 90011310232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13246859025 + 9954451984 = 115095^2 + 99772^2 .

It is a cyclic number.

It is not a de Polignac number, because 23201311009 - 2⁹ = 23201310497 is a prime.

It is not a weakly prime, because it can be changed into another prime (23201311079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11600655504 + 11600655505.

It is an arithmetic number, because the mean of its divisors is an integer number (11600655505).

Almost surely, 2^23201311009 is an apocalyptic number.

It is an amenable number.

23201311009 is a deficient number, since it is larger than the sum of its proper divisors (1).

23201311009 is an equidigital number, since it uses as much as digits as its factorization.

23201311009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 22.

The spelling of 23201311009 in words is "twenty-three billion, two hundred one million, three hundred eleven thousand, nine".