1216982271 has 16 divisors (see below), whose sum is σ = 1654773120. Its totient is φ = 795406560.

The previous prime is 1216982231. The next prime is 1216982293. The reversal of 1216982271 is 1722896121.

It is not a de Polignac number, because 1216982271 - 2¹³ = 1216974079 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216982201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13965 + ... + 51273.

It is an arithmetic number, because the mean of its divisors is an integer number (103423320).

Almost surely, 2^1216982271 is an apocalyptic number.

1216982271 is a deficient number, since it is larger than the sum of its proper divisors (437790849).

1216982271 is a wasteful number, since it uses less digits than its factorization.

1216982271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37526.

The product of its digits is 24192, while the sum is 39.

The square root of 1216982271 is about 34885.2729815892. The cubic root of 1216982271 is about 1067.6479827464.

The spelling of 1216982271 in words is "one billion, two hundred sixteen million, nine hundred eighty-two thousand, two hundred seventy-one".