1216054271 has 2 divisors, whose sum is σ = 1216054272. Its totient is φ = 1216054270.

The previous prime is 1216054253. The next prime is 1216054327. The reversal of 1216054271 is 1724506121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1216054271 - 2¹⁰ = 1216053247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1216054211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608027135 + 608027136.

It is an arithmetic number, because the mean of its divisors is an integer number (608027136).

Almost surely, 2^1216054271 is an apocalyptic number.

1216054271 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216054271 is an equidigital number, since it uses as much as digits as its factorization.

1216054271 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 1216054271 is about 34871.9697034739. The cubic root of 1216054271 is about 1067.3765382905.

The spelling of 1216054271 in words is "one billion, two hundred sixteen million, fifty-four thousand, two hundred seventy-one".