12212751107818 has 12 divisors (see below), whose sum is σ = 18411645286530. Its totient is φ = 6075690210216.

The previous prime is 12212751107801. The next prime is 12212751107819. The reversal of 12212751107818 is 81870115721221.

It can be written as a sum of positive squares in only one way, i.e., 9535021421689 + 2677729686129 = 3087883^2 + 1636377^2 .

It is a super-2 number, since 2×12212751107818² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12212751107819) 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 5 ways as a sum of consecutive naturals, for example, 77019553 + ... + 77177956.

Almost surely, 2^{12212751107818} is an apocalyptic number.

12212751107818 is a deficient number, since it is larger than the sum of its proper divisors (6198894178712).

12212751107818 is an equidigital number, since it uses as much as digits as its factorization.

12212751107818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154197909 (or 154197710 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 46.

The spelling of 12212751107818 in words is "twelve trillion, two hundred twelve billion, seven hundred fifty-one million, one hundred seven thousand, eight hundred eighteen".