545212341221 has 4 divisors (see below), whose sum is σ = 558510203244. Its totient is φ = 531914479200.

The previous prime is 545212341217. The next prime is 545212341229. The reversal of 545212341221 is 122143212545.

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 212497950625 + 332714390596 = 460975^2 + 576814^2 .

It is a cyclic number.

It is not a de Polignac number, because 545212341221 - 2² = 545212341217 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 (545212341229) 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, 6648930950 + ... + 6648931031.

It is an arithmetic number, because the mean of its divisors is an integer number (139627550811).

Almost surely, 2^545212341221 is an apocalyptic number.

It is an amenable number.

545212341221 is a deficient number, since it is larger than the sum of its proper divisors (13297862023).

545212341221 is a wasteful number, since it uses less digits than its factorization.

545212341221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13297862022.

The product of its digits is 19200, while the sum is 32.

Adding to 545212341221 its reverse (122143212545), we get a palindrome (667355553766).

The spelling of 545212341221 in words is "five hundred forty-five billion, two hundred twelve million, three hundred forty-one thousand, two hundred twenty-one".