12221555615608 has 32 divisors (see below), whose sum is σ = 23221988100000. Its totient is φ = 6029568662400.

The previous prime is 12221555615603. The next prime is 12221555615629. The reversal of 12221555615608 is 80651655512221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221555615603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33770283 + ... + 34130266.

It is an arithmetic number, because the mean of its divisors is an integer number (725687128125).

Almost surely, 2^{12221555615608} is an apocalyptic number.

It is an amenable number.

12221555615608 is a deficient number, since it is larger than the sum of its proper divisors (11000432484392).

12221555615608 is a wasteful number, since it uses less digits than its factorization.

12221555615608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67900855 (or 67900851 counting only the distinct ones).

The product of its (nonzero) digits is 1440000, while the sum is 49.

The spelling of 12221555615608 in words is "twelve trillion, two hundred twenty-one billion, five hundred fifty-five million, six hundred fifteen thousand, six hundred eight".