5130021421 has 16 divisors (see below), whose sum is σ = 6045508224. Its totient is φ = 4262192064.

The previous prime is 5130021409. The next prime is 5130021437. The reversal of 5130021421 is 1241200315.

It is a cyclic number.

It is not a de Polignac number, because 5130021421 - 2⁷ = 5130021293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5130021521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52506 + ... + 114091.

It is an arithmetic number, because the mean of its divisors is an integer number (377844264).

Almost surely, 2^5130021421 is an apocalyptic number.

It is an amenable number.

5130021421 is a deficient number, since it is larger than the sum of its proper divisors (915486803).

5130021421 is a wasteful number, since it uses less digits than its factorization.

5130021421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166740.

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

The square root of 5130021421 is about 71624.1678555500. The cubic root of 5130021421 is about 1724.6715242088.

Adding to 5130021421 its reverse (1241200315), we get a palindrome (6371221736).

The spelling of 5130021421 in words is "five billion, one hundred thirty million, twenty-one thousand, four hundred twenty-one".