384042207221 has 4 divisors (see below), whose sum is σ = 384477136992. Its totient is φ = 383607277452.

The previous prime is 384042207217. The next prime is 384042207247. The reversal of 384042207221 is 122702240483.

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 384042207221 - 2² = 384042207217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384042207251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217463561 + ... + 217465326.

It is an arithmetic number, because the mean of its divisors is an integer number (96119284248).

Almost surely, 2^384042207221 is an apocalyptic number.

It is an amenable number.

384042207221 is a deficient number, since it is larger than the sum of its proper divisors (434929771).

384042207221 is an equidigital number, since it uses as much as digits as its factorization.

384042207221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434929770.

The product of its (nonzero) digits is 43008, while the sum is 35.

The spelling of 384042207221 in words is "three hundred eighty-four billion, forty-two million, two hundred seven thousand, two hundred twenty-one".