2217121216 has 14 divisors (see below), whose sum is σ = 4399600040. Its totient is φ = 1108560576.

The previous prime is 2217121211. The next prime is 2217121219. The reversal of 2217121216 is 6121217122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2217121211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17321196 + ... + 17321323.

Almost surely, 2^2217121216 is an apocalyptic number.

It is an amenable number.

2217121216 is a deficient number, since it is larger than the sum of its proper divisors (2182478824).

2217121216 is an equidigital number, since it uses as much as digits as its factorization.

2217121216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34642531 (or 34642521 counting only the distinct ones).

The product of its digits is 672, while the sum is 25.

The square root of 2217121216 is about 47086.3166535672. The cubic root of 2217121216 is about 1303.9566272098.

Adding to 2217121216 its reverse (6121217122), we get a palindrome (8338338338).

The spelling of 2217121216 in words is "two billion, two hundred seventeen million, one hundred twenty-one thousand, two hundred sixteen".