545221051212 has 12 divisors (see below), whose sum is σ = 1272182452856. Its totient is φ = 181740350400.

The previous prime is 545221051171. The next prime is 545221051213. The reversal of 545221051212 is 212150122545.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 545221051212.

It is not an unprimeable number, because it can be changed into a prime (545221051213) 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, 22717543789 + ... + 22717543812.

Almost surely, 2^545221051212 is an apocalyptic number.

It is an amenable number.

545221051212 is an abundant number, since it is smaller than the sum of its proper divisors (726961401644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

545221051212 is a wasteful number, since it uses less digits than its factorization.

545221051212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45435087608 (or 45435087606 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 30.

Adding to 545221051212 its reverse (212150122545), we get a palindrome (757371173757).

The spelling of 545221051212 in words is "five hundred forty-five billion, two hundred twenty-one million, fifty-one thousand, two hundred twelve".