12216502506 has 32 divisors (see below), whose sum is σ = 27161261568. Its totient is φ = 3637667520.

The previous prime is 12216502499. The next prime is 12216502511. The reversal of 12216502506 is 60520561221.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2523741 + ... + 2528576.

It is an arithmetic number, because the mean of its divisors is an integer number (848789424).

Almost surely, 2^12216502506 is an apocalyptic number.

12216502506 is an abundant number, since it is smaller than the sum of its proper divisors (14944759062).

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

12216502506 is a wasteful number, since it uses less digits than its factorization.

12216502506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5052366.

The product of its (nonzero) digits is 7200, while the sum is 30.

The spelling of 12216502506 in words is "twelve billion, two hundred sixteen million, five hundred two thousand, five hundred six".