34123545221 has 4 divisors (see below), whose sum is σ = 34142621100. Its totient is φ = 34104469344.

The previous prime is 34123545187. The next prime is 34123545229. The reversal of 34123545221 is 12254532143.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22456521025 + 11667024196 = 149855^2 + 108014^2 .

It is a cyclic number.

It is not a de Polignac number, because 34123545221 - 2¹⁰ = 34123544197 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 (34123545229) 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 3 ways as a sum of consecutive naturals, for example, 9535256 + ... + 9538833.

It is an arithmetic number, because the mean of its divisors is an integer number (8535655275).

Almost surely, 2^34123545221 is an apocalyptic number.

It is an amenable number.

34123545221 is a deficient number, since it is larger than the sum of its proper divisors (19075879).

34123545221 is a wasteful number, since it uses less digits than its factorization.

34123545221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19075878.

The product of its digits is 28800, while the sum is 32.

The spelling of 34123545221 in words is "thirty-four billion, one hundred twenty-three million, five hundred forty-five thousand, two hundred twenty-one".