1221846271 has 2 divisors, whose sum is σ = 1221846272. Its totient is φ = 1221846270.

The previous prime is 1221846233. The next prime is 1221846293. The reversal of 1221846271 is 1726481221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1221846271 - 2¹¹ = 1221844223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221846221) 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, 610923135 + 610923136.

It is an arithmetic number, because the mean of its divisors is an integer number (610923136).

Almost surely, 2^1221846271 is an apocalyptic number.

1221846271 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221846271 is an equidigital number, since it uses as much as digits as its factorization.

1221846271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10752, while the sum is 34.

The square root of 1221846271 is about 34954.9176940813. The cubic root of 1221846271 is about 1069.0684736246.

The spelling of 1221846271 in words is "one billion, two hundred twenty-one million, eight hundred forty-six thousand, two hundred seventy-one".