1222161916 has 12 divisors (see below), whose sum is σ = 2165857120. Its totient is φ = 603345600.

The previous prime is 1222161827. The next prime is 1222161923. The reversal of 1222161916 is 6191612221.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1933485 + ... + 1934116.

Almost surely, 2^1222161916 is an apocalyptic number.

It is an amenable number.

1222161916 is a deficient number, since it is larger than the sum of its proper divisors (943695204).

1222161916 is a wasteful number, since it uses less digits than its factorization.

1222161916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3867684 (or 3867682 counting only the distinct ones).

The product of its digits is 2592, while the sum is 31.

The square root of 1222161916 is about 34959.4324324638. The cubic root of 1222161916 is about 1069.1605247750.

The spelling of 1222161916 in words is "one billion, two hundred twenty-two million, one hundred sixty-one thousand, nine hundred sixteen".