23111511001 has 2 divisors, whose sum is σ = 23111511002. Its totient is φ = 23111511000.

The previous prime is 23111510953. The next prime is 23111511079. The reversal of 23111511001 is 10011511132.

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., 16375041225 + 6736469776 = 127965^2 + 82076^2 .

It is a cyclic number.

It is not a de Polignac number, because 23111511001 - 2¹⁵ = 23111478233 is a prime.

It is not a weakly prime, because it can be changed into another prime (23411511001) 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, 11555755500 + 11555755501.

It is an arithmetic number, because the mean of its divisors is an integer number (11555755501).

Almost surely, 2^23111511001 is an apocalyptic number.

It is an amenable number.

23111511001 is a deficient number, since it is larger than the sum of its proper divisors (1).

23111511001 is an equidigital number, since it uses as much as digits as its factorization.

23111511001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30, while the sum is 16.

The spelling of 23111511001 in words is "twenty-three billion, one hundred eleven million, five hundred eleven thousand, one".