12221078211838 has 32 divisors (see below), whose sum is σ = 18445703657472. Its totient is φ = 6072579955200.

The previous prime is 12221078211833. The next prime is 12221078211841. The reversal of 12221078211838 is 83811287012221.

It is a super-2 number, since 2×12221078211838² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221078211833) 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 15 ways as a sum of consecutive naturals, for example, 2304556695 + ... + 2304561997.

It is an arithmetic number, because the mean of its divisors is an integer number (576428239296).

Almost surely, 2^{12221078211838} is an apocalyptic number.

12221078211838 is a deficient number, since it is larger than the sum of its proper divisors (6224625445634).

12221078211838 is a wasteful number, since it uses less digits than its factorization.

12221078211838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10560.

The product of its (nonzero) digits is 172032, while the sum is 46.

The spelling of 12221078211838 in words is "twelve trillion, two hundred twenty-one billion, seventy-eight million, two hundred eleven thousand, eight hundred thirty-eight".