12501222056 has 32 divisors (see below), whose sum is σ = 24121342080. Its totient is φ = 6070896000.

The previous prime is 12501222053. The next prime is 12501222061. The reversal of 12501222056 is 65022210521.

It is a super-4 number, since 4×12501222056⁴ (a number of 41 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (12501222053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77645 + ... + 176156.

It is an arithmetic number, because the mean of its divisors is an integer number (753791940).

Almost surely, 2^12501222056 is an apocalyptic number.

It is an amenable number.

12501222056 is a deficient number, since it is larger than the sum of its proper divisors (11620120024).

12501222056 is a wasteful number, since it uses less digits than its factorization.

12501222056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253985 (or 253981 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 12501222056 its reverse (65022210521), we get a palindrome (77523432577).

The spelling of 12501222056 in words is "twelve billion, five hundred one million, two hundred twenty-two thousand, fifty-six".