305342034206221 has 4 divisors (see below), whose sum is σ = 305509528467072. Its totient is φ = 305174539945372.

The previous prime is 305342034206101. The next prime is 305342034206239. The reversal of 305342034206221 is 122602430243503.

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 305342034206221 - 2²¹ = 305342032109069 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 (305342034206281) 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, 83747127691 + ... + 83747131336.

It is an arithmetic number, because the mean of its divisors is an integer number (76377382116768).

Almost surely, 2^{305342034206221} is an apocalyptic number.

It is an amenable number.

305342034206221 is a deficient number, since it is larger than the sum of its proper divisors (167494260851).

305342034206221 is a wasteful number, since it uses less digits than its factorization.

305342034206221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167494260850.

The product of its (nonzero) digits is 207360, while the sum is 37.

Adding to 305342034206221 its reverse (122602430243503), we get a palindrome (427944464449724).

The spelling of 305342034206221 in words is "three hundred five trillion, three hundred forty-two billion, thirty-four million, two hundred six thousand, two hundred twenty-one".