1216130975091 has 6 divisors (see below), whose sum is σ = 1756633630700. Its totient is φ = 810753983388.

The previous prime is 1216130975089. The next prime is 1216130975119. The reversal of 1216130975091 is 1905790316121.

1216130975091 is a `hidden beast` number, since 1 + 2 + 1 + 6 + 130 + 9 + 7 + 509 + 1 = 666.

It is not a de Polignac number, because 1216130975091 - 2¹ = 1216130975089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1216130975011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67562831941 + ... + 67562831958.

Almost surely, 2^{1216130975091} is an apocalyptic number.

1216130975091 is a deficient number, since it is larger than the sum of its proper divisors (540502655609).

1216130975091 is a wasteful number, since it uses less digits than its factorization.

1216130975091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135125663905 (or 135125663902 counting only the distinct ones).

The product of its (nonzero) digits is 102060, while the sum is 45.

The spelling of 1216130975091 in words is "one trillion, two hundred sixteen billion, one hundred thirty million, nine hundred seventy-five thousand, ninety-one".