12216421576616 has 64 divisors (see below), whose sum is σ = 24560971200000. Its totient is φ = 5679146506176.

The previous prime is 12216421576613. The next prime is 12216421576661. The reversal of 12216421576616 is 61667512461221.

It is a super-2 number, since 2×12216421576616² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12216421576613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4234751 + ... + 6508913.

It is an arithmetic number, because the mean of its divisors is an integer number (383765175000).

Almost surely, 2^{12216421576616} is an apocalyptic number.

It is an amenable number.

12216421576616 is an abundant number, since it is smaller than the sum of its proper divisors (12344549623384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12216421576616 is a wasteful number, since it uses less digits than its factorization.

12216421576616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2274846 (or 2274842 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 50.

The spelling of 12216421576616 in words is "twelve trillion, two hundred sixteen billion, four hundred twenty-one million, five hundred seventy-six thousand, six hundred sixteen".