12215666530 has 16 divisors (see below), whose sum is σ = 21991455360. Its totient is φ = 4885543152.

The previous prime is 12215666509. The next prime is 12215666531. The reversal of 12215666530 is 3566651221.

It is a self number, because there is not a number n which added to its sum of digits gives 12215666530.

It is not an unprimeable number, because it can be changed into a prime (12215666531) 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, 16650 + ... + 157189.

It is an arithmetic number, because the mean of its divisors is an integer number (1374465960).

Almost surely, 2^12215666530 is an apocalyptic number.

12215666530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12215666530 is a deficient number, since it is larger than the sum of its proper divisors (9775788830).

12215666530 is a wasteful number, since it uses less digits than its factorization.

12215666530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180873.

The product of its (nonzero) digits is 64800, while the sum is 37.

The spelling of 12215666530 in words is "twelve billion, two hundred fifteen million, six hundred sixty-six thousand, five hundred thirty".