1213066216 has 16 divisors (see below), whose sum is σ = 2289766500. Its totient is φ = 602461824.

The previous prime is 1213066121. The next prime is 1213066223. The reversal of 1213066216 is 6126603121.

It can be written as a sum of positive squares in 2 ways, for example, as 1207562500 + 5503716 = 34750^2 + 2346^2 .

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, 507645 + ... + 510028.

Almost surely, 2^1213066216 is an apocalyptic number.

It is an amenable number.

1213066216 is a deficient number, since it is larger than the sum of its proper divisors (1076700284).

1213066216 is a wasteful number, since it uses less digits than its factorization.

1213066216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017828 (or 1017824 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 1213066216 is about 34829.1001319299. The cubic root of 1213066216 is about 1066.5015785305.

Adding to 1213066216 its reverse (6126603121), we get a palindrome (7339669337).

The spelling of 1213066216 in words is "one billion, two hundred thirteen million, sixty-six thousand, two hundred sixteen".