12221545868811 has 40 divisors (see below), whose sum is σ = 18476259143760. Its totient is φ = 8049932554752.

The previous prime is 12221545868789. The next prime is 12221545868821. The reversal of 12221545868811 is 11886854512221.

It is a happy number.

12221545868811 is a `hidden beast` number, since 1 + 2 + 2 + 2 + 1 + 54 + 586 + 8 + 8 + 1 + 1 = 666.

It is not a de Polignac number, because 12221545868811 - 2⁹ = 12221545868299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12221545868821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 8696520 + ... + 10003626.

It is an arithmetic number, because the mean of its divisors is an integer number (461906478594).

Almost surely, 2^{12221545868811} is an apocalyptic number.

12221545868811 is a deficient number, since it is larger than the sum of its proper divisors (6254713274949).

12221545868811 is a wasteful number, since it uses less digits than its factorization.

12221545868811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308505 (or 1308496 counting only the distinct ones).

The product of its digits is 2457600, while the sum is 54.

The spelling of 12221545868811 in words is "twelve trillion, two hundred twenty-one billion, five hundred forty-five million, eight hundred sixty-eight thousand, eight hundred eleven".