1216000543723 has 24 divisors (see below), whose sum is σ = 1513389840720. Its totient is φ = 971241606720.

The previous prime is 1216000543717. The next prime is 1216000543753. The reversal of 1216000543723 is 3273450006121.

It is not a de Polignac number, because 1216000543723 - 2⁹ = 1216000543211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1216000543753) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10649136 + ... + 10762717.

It is an arithmetic number, because the mean of its divisors is an integer number (63057910030).

Almost surely, 2^{1216000543723} is an apocalyptic number.

1216000543723 is a deficient number, since it is larger than the sum of its proper divisors (297389296997).

1216000543723 is a wasteful number, since it uses less digits than its factorization.

1216000543723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21411947 (or 21411940 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

Adding to 1216000543723 its reverse (3273450006121), we get a palindrome (4489450549844).

The spelling of 1216000543723 in words is "one trillion, two hundred sixteen billion, five hundred forty-three thousand, seven hundred twenty-three".