23201121211 has 2 divisors, whose sum is σ = 23201121212. Its totient is φ = 23201121210.

The previous prime is 23201121193. The next prime is 23201121239. The reversal of 23201121211 is 11212110232.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23201121211 - 2²¹ = 23199024059 is a prime.

It is not a weakly prime, because it can be changed into another prime (23201121271) 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, 11600560605 + 11600560606.

It is an arithmetic number, because the mean of its divisors is an integer number (11600560606).

Almost surely, 2^23201121211 is an apocalyptic number.

23201121211 is a deficient number, since it is larger than the sum of its proper divisors (1).

23201121211 is an equidigital number, since it uses as much as digits as its factorization.

23201121211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 23201121211 its reverse (11212110232), we get a palindrome (34413231443).

The spelling of 23201121211 in words is "twenty-three billion, two hundred one million, one hundred twenty-one thousand, two hundred eleven".