1216081423823 has 8 divisors (see below), whose sum is σ = 1390115334048. Its totient is φ = 1042124511744.

The previous prime is 1216081423811. The next prime is 1216081423841. The reversal of 1216081423823 is 3283241806121.

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

It is a cyclic number.

It is not a de Polignac number, because 1216081423823 - 2⁴ = 1216081423807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216081422823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19215686 + ... + 19278867.

It is an arithmetic number, because the mean of its divisors is an integer number (173764416756).

Almost surely, 2^{1216081423823} is an apocalyptic number.

1216081423823 is a deficient number, since it is larger than the sum of its proper divisors (174033910225).

1216081423823 is an equidigital number, since it uses as much as digits as its factorization.

1216081423823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38499073.

The product of its (nonzero) digits is 110592, while the sum is 41.

The spelling of 1216081423823 in words is "one trillion, two hundred sixteen billion, eighty-one million, four hundred twenty-three thousand, eight hundred twenty-three".