12211010011511 has 2 divisors, whose sum is σ = 12211010011512. Its totient is φ = 12211010011510.

The previous prime is 12211010011507. The next prime is 12211010011561. The reversal of 12211010011511 is 11511001011221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12211010011511 - 2² = 12211010011507 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12211010011511.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12211010011561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105505005755 + 6105505005756.

It is an arithmetic number, because the mean of its divisors is an integer number (6105505005756).

Almost surely, 2^{12211010011511} is an apocalyptic number.

12211010011511 is a deficient number, since it is larger than the sum of its proper divisors (1).

12211010011511 is an equidigital number, since it uses as much as digits as its factorization.

12211010011511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20, while the sum is 17.

Adding to 12211010011511 its reverse (11511001011221), we get a palindrome (23722011022732).

The spelling of 12211010011511 in words is "twelve trillion, two hundred eleven billion, ten million, eleven thousand, five hundred eleven".