1216771222 has 8 divisors (see below), whose sum is σ = 1828366200. Its totient is φ = 607315824.

The previous prime is 1216771187. The next prime is 1216771223. The reversal of 1216771222 is 2221776121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216771223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 533472 + ... + 535747.

It is an arithmetic number, because the mean of its divisors is an integer number (228545775).

Almost surely, 2^1216771222 is an apocalyptic number.

1216771222 is a deficient number, since it is larger than the sum of its proper divisors (611594978).

1216771222 is a wasteful number, since it uses less digits than its factorization.

1216771222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069790.

The product of its digits is 4704, while the sum is 31.

The square root of 1216771222 is about 34882.2479493510. The cubic root of 1216771222 is about 1067.5862620264.

The spelling of 1216771222 in words is "one billion, two hundred sixteen million, seven hundred seventy-one thousand, two hundred twenty-two".