134043440221 has 4 divisors (see below), whose sum is σ = 134737966012. Its totient is φ = 133348914432.

The previous prime is 134043440213. The next prime is 134043440231. The reversal of 134043440221 is 122044340431.

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 29723484025 + 104319956196 = 172405^2 + 322986^2 .

It is a cyclic number.

It is not a de Polignac number, because 134043440221 - 2³ = 134043440213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 134043440221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134043440231) 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, 347262606 + ... + 347262991.

It is an arithmetic number, because the mean of its divisors is an integer number (33684491503).

Almost surely, 2^134043440221 is an apocalyptic number.

It is an amenable number.

134043440221 is a deficient number, since it is larger than the sum of its proper divisors (694525791).

134043440221 is an equidigital number, since it uses as much as digits as its factorization.

134043440221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694525790.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 134043440221 its reverse (122044340431), we get a palindrome (256087780652).

The spelling of 134043440221 in words is "one hundred thirty-four billion, forty-three million, four hundred forty thousand, two hundred twenty-one".