1211968271 has 2 divisors, whose sum is σ = 1211968272. Its totient is φ = 1211968270.

The previous prime is 1211968249. The next prime is 1211968291. The reversal of 1211968271 is 1728691121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1211968271 - 2¹⁴ = 1211951887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211968291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605984135 + 605984136.

It is an arithmetic number, because the mean of its divisors is an integer number (605984136).

Almost surely, 2^1211968271 is an apocalyptic number.

1211968271 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211968271 is an equidigital number, since it uses as much as digits as its factorization.

1211968271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 38.

The square root of 1211968271 is about 34813.3346722201. The cubic root of 1211968271 is about 1066.1797182406.

The spelling of 1211968271 in words is "one billion, two hundred eleven million, nine hundred sixty-eight thousand, two hundred seventy-one".