321487784123 has 24 divisors (see below), whose sum is σ = 358856750448. Its totient is φ = 285553080000.

The previous prime is 321487784113. The next prime is 321487784183.

321487784123 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 321487784123 - 2²⁰ = 321486735547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321487784113) 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 23 ways as a sum of consecutive naturals, for example, 15288965 + ... + 15309977.

It is an arithmetic number, because the mean of its divisors is an integer number (14952364602).

Almost surely, 2^321487784123 is an apocalyptic number.

321487784123 is a deficient number, since it is larger than the sum of its proper divisors (37368966325).

321487784123 is a wasteful number, since it uses less digits than its factorization.

321487784123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21387 (or 21236 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 50.

The spelling of 321487784123 in words is "three hundred twenty-one billion, four hundred eighty-seven million, seven hundred eighty-four thousand, one hundred twenty-three".