1216213630136 has 16 divisors (see below), whose sum is σ = 2284970505000. Its totient is φ = 606888162144.

The previous prime is 1216213630123. The next prime is 1216213630153. The reversal of 1216213630136 is 6310363126121.

It is a junction number, because it is equal to n+sod(n) for n = 1216213630096 and 1216213630105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152327375 + ... + 152335358.

Almost surely, 2^{1216213630136} is an apocalyptic number.

It is an amenable number.

1216213630136 is a deficient number, since it is larger than the sum of its proper divisors (1068756874864).

1216213630136 is a wasteful number, since it uses less digits than its factorization.

1216213630136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304663238 (or 304663234 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 35.

Adding to 1216213630136 its reverse (6310363126121), we get a palindrome (7526576756257).

The spelling of 1216213630136 in words is "one trillion, two hundred sixteen billion, two hundred thirteen million, six hundred thirty thousand, one hundred thirty-six".