1216215115365 has 8 divisors (see below), whose sum is σ = 1945944184608. Its totient is φ = 648648061520.

The previous prime is 1216215115331. The next prime is 1216215115373. The reversal of 1216215115365 is 5635115126121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1216215115365 - 2⁶ = 1216215115301 is a prime.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 40540503831 + ... + 40540503860.

It is an arithmetic number, because the mean of its divisors is an integer number (243243023076).

Almost surely, 2^{1216215115365} is an apocalyptic number.

1216215115365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1216215115365 is a deficient number, since it is larger than the sum of its proper divisors (729729069243).

1216215115365 is an equidigital number, since it uses as much as digits as its factorization.

1216215115365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81081007699.

The product of its digits is 54000, while the sum is 39.

The spelling of 1216215115365 in words is "one trillion, two hundred sixteen billion, two hundred fifteen million, one hundred fifteen thousand, three hundred sixty-five".