1216800803 has 2 divisors, whose sum is σ = 1216800804. Its totient is φ = 1216800802.

The previous prime is 1216800779. The next prime is 1216800811. The reversal of 1216800803 is 3080086121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1216800803 - 2⁸ = 1216800547 is a prime.

It is not a weakly prime, because it can be changed into another prime (1216805803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608400401 + 608400402.

It is an arithmetic number, because the mean of its divisors is an integer number (608400402).

Almost surely, 2^1216800803 is an apocalyptic number.

1216800803 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216800803 is an equidigital number, since it uses as much as digits as its factorization.

1216800803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 1216800803 is about 34882.6719590114. The cubic root of 1216800803 is about 1067.5949133414.

Adding to 1216800803 its reverse (3080086121), we get a palindrome (4296886924).

The spelling of 1216800803 in words is "one billion, two hundred sixteen million, eight hundred thousand, eight hundred three".