1216103263 has 2 divisors, whose sum is σ = 1216103264. Its totient is φ = 1216103262.

The previous prime is 1216103243. The next prime is 1216103281. The reversal of 1216103263 is 3623016121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1216103263 - 2¹³ = 1216095071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1216103233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608051631 + 608051632.

It is an arithmetic number, because the mean of its divisors is an integer number (608051632).

Almost surely, 2^1216103263 is an apocalyptic number.

1216103263 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216103263 is an equidigital number, since it uses as much as digits as its factorization.

1216103263 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 1216103263 is about 34872.6721517007. The cubic root of 1216103263 is about 1067.3908721379.

Adding to 1216103263 its reverse (3623016121), we get a palindrome (4839119384).

The spelling of 1216103263 in words is "one billion, two hundred sixteen million, one hundred three thousand, two hundred sixty-three".