5210212421 has 2 divisors, whose sum is σ = 5210212422. Its totient is φ = 5210212420.

The previous prime is 5210212417. The next prime is 5210212451. The reversal of 5210212421 is 1242120125.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5062322500 + 147889921 = 71150^2 + 12161^2 .

It is a cyclic number.

It is not a de Polignac number, because 5210212421 - 2² = 5210212417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5210212393 and 5210212402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5210212451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2605106210 + 2605106211.

It is an arithmetic number, because the mean of its divisors is an integer number (2605106211).

Almost surely, 2^5210212421 is an apocalyptic number.

It is an amenable number.

5210212421 is a deficient number, since it is larger than the sum of its proper divisors (1).

5210212421 is an equidigital number, since it uses as much as digits as its factorization.

5210212421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 5210212421 is about 72181.8011759197. The cubic root of 5210212421 is about 1733.6116226707.

Adding to 5210212421 its reverse (1242120125), we get a palindrome (6452332546).

The spelling of 5210212421 in words is "five billion, two hundred ten million, two hundred twelve thousand, four hundred twenty-one".