1216022066 has 16 divisors (see below), whose sum is σ = 2085652800. Its totient is φ = 520891440.

The previous prime is 1216022051. The next prime is 1216022077. The reversal of 1216022066 is 6602206121.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 8696 + ... + 50076.

It is an arithmetic number, because the mean of its divisors is an integer number (130353300).

Almost surely, 2^1216022066 is an apocalyptic number.

1216022066 is a deficient number, since it is larger than the sum of its proper divisors (869630734).

1216022066 is a wasteful number, since it uses less digits than its factorization.

1216022066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43489.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 1216022066 is about 34871.5079398640. The cubic root of 1216022066 is about 1067.3671156943.

Adding to 1216022066 its reverse (6602206121), we get a palindrome (7818228187).

The spelling of 1216022066 in words is "one billion, two hundred sixteen million, twenty-two thousand, sixty-six".