4521221123305 has 4 divisors (see below), whose sum is σ = 5425465347972. Its totient is φ = 3616976898640.

The previous prime is 4521221123303. The next prime is 4521221123333. The reversal of 4521221123305 is 5033211221254.

It is a happy number.

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 2196925733209 + 2324295390096 = 1482203^2 + 1524564^2 .

It is not a de Polignac number, because 4521221123305 - 2¹ = 4521221123303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4521221123303) 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, 452122112326 + ... + 452122112335.

It is an arithmetic number, because the mean of its divisors is an integer number (1356366336993).

Almost surely, 2^{4521221123305} is an apocalyptic number.

It is an amenable number.

4521221123305 is a deficient number, since it is larger than the sum of its proper divisors (904244224667).

4521221123305 is an equidigital number, since it uses as much as digits as its factorization.

4521221123305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904244224666.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 4521221123305 its reverse (5033211221254), we get a palindrome (9554432344559).

The spelling of 4521221123305 in words is "four trillion, five hundred twenty-one billion, two hundred twenty-one million, one hundred twenty-three thousand, three hundred five".