545221214221 has 8 divisors (see below), whose sum is σ = 556256024064. Its totient is φ = 534271615680.

The previous prime is 545221214191. The next prime is 545221214231. The reversal of 545221214221 is 122412122545.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 545221214221 - 2¹⁷ = 545221083149 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 (545221214231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21289900 + ... + 21315493.

It is an arithmetic number, because the mean of its divisors is an integer number (69532003008).

Almost surely, 2^545221214221 is an apocalyptic number.

It is an amenable number.

545221214221 is a deficient number, since it is larger than the sum of its proper divisors (11034809843).

545221214221 is a wasteful number, since it uses less digits than its factorization.

545221214221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42605651.

The product of its digits is 12800, while the sum is 31.

Adding to 545221214221 its reverse (122412122545), we get a palindrome (667633336766).

The spelling of 545221214221 in words is "five hundred forty-five billion, two hundred twenty-one million, two hundred fourteen thousand, two hundred twenty-one".