5121321001 has 4 divisors (see below), whose sum is σ = 5121926404. Its totient is φ = 5120715600.

The previous prime is 5121320987. The next prime is 5121321011. The reversal of 5121321001 is 1001231215.

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 781146601 + 4340174400 = 27949^2 + 65880^2 .

It is a cyclic number.

It is not a de Polignac number, because 5121321001 - 2¹⁷ = 5121189929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5121321011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 289830 + ... + 306991.

It is an arithmetic number, because the mean of its divisors is an integer number (1280481601).

Almost surely, 2^5121321001 is an apocalyptic number.

It is an amenable number.

5121321001 is a deficient number, since it is larger than the sum of its proper divisors (605403).

5121321001 is an equidigital number, since it uses as much as digits as its factorization.

5121321001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605402.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 5121321001 is about 71563.4054597739. The cubic root of 5121321001 is about 1723.6959689865.

Adding to 5121321001 its reverse (1001231215), we get a palindrome (6122552216).

The spelling of 5121321001 in words is "five billion, one hundred twenty-one million, three hundred twenty-one thousand, one".