1212162216 has 32 divisors (see below), whose sum is σ = 3032022240. Its totient is φ = 403838528.

The previous prime is 1212162199. The next prime is 1212162223. The reversal of 1212162216 is 6122612121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36190 + ... + 61106.

It is an arithmetic number, because the mean of its divisors is an integer number (94750695).

Almost surely, 2^1212162216 is an apocalyptic number.

It is an amenable number.

1212162216 is an abundant number, since it is smaller than the sum of its proper divisors (1819860024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1212162216 is a wasteful number, since it uses less digits than its factorization.

1212162216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26953 (or 26949 counting only the distinct ones).

The product of its digits is 576, while the sum is 24.

The square root of 1212162216 is about 34816.1200595356. The cubic root of 1212162216 is about 1066.2365869451.

Adding to 1212162216 its reverse (6122612121), we get a palindrome (7334774337).

The spelling of 1212162216 in words is "one billion, two hundred twelve million, one hundred sixty-two thousand, two hundred sixteen".