1216340206277 has 4 divisors (see below), whose sum is σ = 1390103092896. Its totient is φ = 1042577319660.

The previous prime is 1216340206201. The next prime is 1216340206303. The reversal of 1216340206277 is 7726020436121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1216340206277 - 2¹⁰ = 1216340205253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216340203277) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 86881443299 + ... + 86881443312.

It is an arithmetic number, because the mean of its divisors is an integer number (347525773224).

Almost surely, 2^{1216340206277} is an apocalyptic number.

It is an amenable number.

1216340206277 is a deficient number, since it is larger than the sum of its proper divisors (173762886619).

1216340206277 is an equidigital number, since it uses as much as digits as its factorization.

1216340206277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173762886618.

The product of its (nonzero) digits is 169344, while the sum is 41.

The spelling of 1216340206277 in words is "one trillion, two hundred sixteen billion, three hundred forty million, two hundred six thousand, two hundred seventy-seven".