1216882019 has 2 divisors, whose sum is σ = 1216882020. Its totient is φ = 1216882018.

The previous prime is 1216881979. The next prime is 1216882027. The reversal of 1216882019 is 9102886121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1216882019 - 2¹² = 1216877923 is a prime.

It is a super-2 number, since 2×1216882019² = 2961603696331032722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1216882319) 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, 608441009 + 608441010.

It is an arithmetic number, because the mean of its divisors is an integer number (608441010).

Almost surely, 2^1216882019 is an apocalyptic number.

1216882019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216882019 is an equidigital number, since it uses as much as digits as its factorization.

1216882019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 38.

The square root of 1216882019 is about 34883.8360705929. The cubic root of 1216882019 is about 1067.6186652049.

The spelling of 1216882019 in words is "one billion, two hundred sixteen million, eight hundred eighty-two thousand, nineteen".