1212996217 has 2 divisors, whose sum is σ = 1212996218. Its totient is φ = 1212996216.

The previous prime is 1212996209. The next prime is 1212996227. The reversal of 1212996217 is 7126992121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1195154041 + 17842176 = 34571^2 + 4224^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212996217 - 2³ = 1212996209 is a prime.

It is a super-2 number, since 2×1212996217² = 2942719644912622178, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1212996217.

It is not a weakly prime, because it can be changed into another prime (1212996227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606498108 + 606498109.

It is an arithmetic number, because the mean of its divisors is an integer number (606498109).

Almost surely, 2^1212996217 is an apocalyptic number.

It is an amenable number.

1212996217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212996217 is an equidigital number, since it uses as much as digits as its factorization.

1212996217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 40.

The square root of 1212996217 is about 34828.0952249761. The cubic root of 1212996217 is about 1066.4810642670.

The spelling of 1212996217 in words is "one billion, two hundred twelve million, nine hundred ninety-six thousand, two hundred seventeen".