1216212255675 has 36 divisors (see below), whose sum is σ = 2273083089264. Its totient is φ = 620444510400.

The previous prime is 1216212255659. The next prime is 1216212255697. The reversal of 1216212255675 is 5765522126121.

1216212255675 is a `hidden beast` number, since 1 + 2 + 1 + 6 + 2 + 1 + 22 + 556 + 75 = 666.

It is not a de Polignac number, because 1216212255675 - 2⁴ = 1216212255659 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1216212255675.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 117503256 + ... + 117513605.

It is an arithmetic number, because the mean of its divisors is an integer number (63141196924).

Almost surely, 2^{1216212255675} is an apocalyptic number.

1216212255675 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1216212255675 is a deficient number, since it is larger than the sum of its proper divisors (1056870833589).

1216212255675 is a wasteful number, since it uses less digits than its factorization.

1216212255675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235016900 (or 235016892 counting only the distinct ones).

The product of its digits is 504000, while the sum is 45.

The spelling of 1216212255675 in words is "one trillion, two hundred sixteen billion, two hundred twelve million, two hundred fifty-five thousand, six hundred seventy-five".