12221056505 has 32 divisors (see below), whose sum is σ = 16842276864. Its totient is φ = 8339288256.

The previous prime is 12221056483. The next prime is 12221056567. The reversal of 12221056505 is 50565012221.

It is a cyclic number.

It is not a de Polignac number, because 12221056505 - 2¹⁸ = 12220794361 is a prime.

It is an unprimeable number.

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, 7798232 + ... + 7799798.

It is an arithmetic number, because the mean of its divisors is an integer number (526321152).

Almost surely, 2^12221056505 is an apocalyptic number.

It is an amenable number.

12221056505 is a deficient number, since it is larger than the sum of its proper divisors (4621220359).

12221056505 is a wasteful number, since it uses less digits than its factorization.

12221056505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2525.

The product of its (nonzero) digits is 6000, while the sum is 29.

Adding to 12221056505 its reverse (50565012221), we get a palindrome (62786068726).

The spelling of 12221056505 in words is "twelve billion, two hundred twenty-one million, fifty-six thousand, five hundred five".