299805742221 has 4 divisors (see below), whose sum is σ = 399740989632. Its totient is φ = 199870494812.

The previous prime is 299805742219. The next prime is 299805742231. The reversal of 299805742221 is 122247508992.

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 299805742221 - 2¹ = 299805742219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (299805742231) 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, 49967623701 + ... + 49967623706.

It is an arithmetic number, because the mean of its divisors is an integer number (99935247408).

Almost surely, 2^299805742221 is an apocalyptic number.

It is an amenable number.

299805742221 is a deficient number, since it is larger than the sum of its proper divisors (99935247411).

299805742221 is an equidigital number, since it uses as much as digits as its factorization.

299805742221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99935247410.

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 299805742221 in words is "two hundred ninety-nine billion, eight hundred five million, seven hundred forty-two thousand, two hundred twenty-one".