1216566210241 has 16 divisors (see below), whose sum is σ = 1293007170240. Its totient is φ = 1141383398400.

The previous prime is 1216566210239. The next prime is 1216566210247. The reversal of 1216566210241 is 1420126656121.

It is a cyclic number.

It is not a de Polignac number, because 1216566210241 - 2¹ = 1216566210239 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1216566210241.

It is not an unprimeable number, because it can be changed into a prime (1216566210247) 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, 2342646 + ... + 2814448.

It is an arithmetic number, because the mean of its divisors is an integer number (80812948140).

Almost surely, 2^{1216566210241} is an apocalyptic number.

It is an amenable number.

1216566210241 is a deficient number, since it is larger than the sum of its proper divisors (76440959999).

1216566210241 is a wasteful number, since it uses less digits than its factorization.

1216566210241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473136.

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 1216566210241 in words is "one trillion, two hundred sixteen billion, five hundred sixty-six million, two hundred ten thousand, two hundred forty-one".