1216421096 has 16 divisors (see below), whose sum is σ = 2488134240. Its totient is φ = 552918640.

The previous prime is 1216421093. The next prime is 1216421099. The reversal of 1216421096 is 6901246121.

It is an interprime number because it is at equal distance from previous prime (1216421093) and next prime (1216421099).

It is not an unprimeable number, because it can be changed into a prime (1216421093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6911396 + ... + 6911571.

It is an arithmetic number, because the mean of its divisors is an integer number (155508390).

Almost surely, 2^1216421096 is an apocalyptic number.

It is an amenable number.

1216421096 is an abundant number, since it is smaller than the sum of its proper divisors (1271713144).

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

1216421096 is a wasteful number, since it uses less digits than its factorization.

1216421096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13822984 (or 13822980 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 1216421096 is about 34877.2289036844. The cubic root of 1216421096 is about 1067.4838528638.

The spelling of 1216421096 in words is "one billion, two hundred sixteen million, four hundred twenty-one thousand, ninety-six".