5212130221 has 4 divisors (see below), whose sum is σ = 5218753792. Its totient is φ = 5205506652.

The previous prime is 5212130219. The next prime is 5212130237. The reversal of 5212130221 is 1220312125.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5212130221 - 2¹ = 5212130219 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 (5212160221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3310605 + ... + 3312178.

It is an arithmetic number, because the mean of its divisors is an integer number (1304688448).

Almost surely, 2^5212130221 is an apocalyptic number.

It is an amenable number.

5212130221 is a deficient number, since it is larger than the sum of its proper divisors (6623571).

5212130221 is an equidigital number, since it uses as much as digits as its factorization.

5212130221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6623570.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 5212130221 is about 72195.0844656338. The cubic root of 5212130221 is about 1733.8243019410.

Adding to 5212130221 its reverse (1220312125), we get a palindrome (6432442346).

The spelling of 5212130221 in words is "five billion, two hundred twelve million, one hundred thirty thousand, two hundred twenty-one".