1229206820416 has 21 divisors (see below), whose sum is σ = 2439224884939. Its totient is φ = 614598975424.

The previous prime is 1229206820357. The next prime is 1229206820431. The reversal of 1229206820416 is 6140286029221.

The square root of 1229206820416 is 1108696.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 8800275 + ... + 8938861.

Almost surely, 2^{1229206820416} is an apocalyptic number.

1229206820416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

1229206820416 is the 1108696-th square number.

It is an amenable number.

1229206820416 is a deficient number, since it is larger than the sum of its proper divisors (1210018064523).

1229206820416 is an frugal number, since it uses more digits than its factorization.

1229206820416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277186 (or 138589 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 43.

The spelling of 1229206820416 in words is "one trillion, two hundred twenty-nine billion, two hundred six million, eight hundred twenty thousand, four hundred sixteen".