221684342123 has 8 divisors (see below), whose sum is σ = 238572542880. Its totient is φ = 205223690880.

The previous prime is 221684342101. The next prime is 221684342149. The reversal of 221684342123 is 321243486122.

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 221684342123 - 2⁸ = 221684341867 is a prime.

It is a super-3 number, since 3×221684342123³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221684332123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106886303 + ... + 106888376.

It is an arithmetic number, because the mean of its divisors is an integer number (29821567860).

Almost surely, 2^221684342123 is an apocalyptic number.

221684342123 is a deficient number, since it is larger than the sum of its proper divisors (16888200757).

221684342123 is a wasteful number, since it uses less digits than its factorization.

221684342123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213774757.

The product of its digits is 110592, while the sum is 38.

The spelling of 221684342123 in words is "two hundred twenty-one billion, six hundred eighty-four million, three hundred forty-two thousand, one hundred twenty-three".