134320656221 has 4 divisors (see below), whose sum is σ = 134379545244. Its totient is φ = 134261767200.

The previous prime is 134320656203. The next prime is 134320656229. The reversal of 134320656221 is 122656023431.

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 47605130596 + 86715525625 = 218186^2 + 294475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-134320656221 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 (134320656229) 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, 29441090 + ... + 29445651.

It is an arithmetic number, because the mean of its divisors is an integer number (33594886311).

Almost surely, 2^134320656221 is an apocalyptic number.

It is an amenable number.

134320656221 is a deficient number, since it is larger than the sum of its proper divisors (58889023).

134320656221 is an equidigital number, since it uses as much as digits as its factorization.

134320656221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58889022.

The product of its (nonzero) digits is 51840, while the sum is 35.

Adding to 134320656221 its reverse (122656023431), we get a palindrome (256976679652).

The spelling of 134320656221 in words is "one hundred thirty-four billion, three hundred twenty million, six hundred fifty-six thousand, two hundred twenty-one".