1216412222 has 32 divisors (see below), whose sum is σ = 1920376512. Its totient is φ = 577234944.

The previous prime is 1216412207. The next prime is 1216412233. The reversal of 1216412222 is 2222146121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 756143 + ... + 757749.

It is an arithmetic number, because the mean of its divisors is an integer number (60011766).

Almost surely, 2^1216412222 is an apocalyptic number.

1216412222 is a deficient number, since it is larger than the sum of its proper divisors (703964290).

1216412222 is a wasteful number, since it uses less digits than its factorization.

1216412222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1892.

The product of its digits is 768, while the sum is 23.

The square root of 1216412222 is about 34877.1016857766. The cubic root of 1216412222 is about 1067.4812570317.

Adding to 1216412222 its reverse (2222146121), we get a palindrome (3438558343).

The spelling of 1216412222 in words is "one billion, two hundred sixteen million, four hundred twelve thousand, two hundred twenty-two".