12215310055 has 32 divisors (see below), whose sum is σ = 16238827584. Its totient is φ = 8762535936.

The previous prime is 12215310053. The next prime is 12215310059. The reversal of 12215310055 is 55001351221.

It is a cyclic number.

It is not a de Polignac number, because 12215310055 - 2¹ = 12215310053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12215310053) 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 in 31 ways as a sum of consecutive naturals, for example, 1614792 + ... + 1622338.

It is an arithmetic number, because the mean of its divisors is an integer number (507463362).

Almost surely, 2^12215310055 is an apocalyptic number.

12215310055 is a deficient number, since it is larger than the sum of its proper divisors (4023517529).

12215310055 is a wasteful number, since it uses less digits than its factorization.

12215310055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8275.

The product of its (nonzero) digits is 1500, while the sum is 25.

Adding to 12215310055 its reverse (55001351221), we get a palindrome (67216661276).

The spelling of 12215310055 in words is "twelve billion, two hundred fifteen million, three hundred ten thousand, fifty-five".