1212288817 has 2 divisors, whose sum is σ = 1212288818. Its totient is φ = 1212288816.

The previous prime is 1212288811. The next prime is 1212288823. The reversal of 1212288817 is 7188822121.

It is a balanced prime because it is at equal distance from previous prime (1212288811) and next prime (1212288823).

It can be written as a sum of positive squares in only one way, i.e., 1193287936 + 19000881 = 34544^2 + 4359^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212288817 - 2⁷ = 1212288689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1212288817.

It is not a weakly prime, because it can be changed into another prime (1212288811) 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 as a sum of consecutive naturals, namely, 606144408 + 606144409.

It is an arithmetic number, because the mean of its divisors is an integer number (606144409).

Almost surely, 2^1212288817 is an apocalyptic number.

It is an amenable number.

1212288817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212288817 is an equidigital number, since it uses as much as digits as its factorization.

1212288817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28672, while the sum is 40.

The square root of 1212288817 is about 34817.9381497526. The cubic root of 1212288817 is about 1066.2737057172.

The spelling of 1212288817 in words is "one billion, two hundred twelve million, two hundred eighty-eight thousand, eight hundred seventeen".