5244121321 has 2 divisors, whose sum is σ = 5244121322. Its totient is φ = 5244121320.

The previous prime is 5244121313. The next prime is 5244121339. The reversal of 5244121321 is 1231214425.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4480428096 + 763693225 = 66936^2 + 27635^2 .

It is a cyclic number.

It is not a de Polignac number, because 5244121321 - 2³ = 5244121313 is a prime.

It is not a weakly prime, because it can be changed into another prime (5244121361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2622060660 + 2622060661.

It is an arithmetic number, because the mean of its divisors is an integer number (2622060661).

Almost surely, 2^5244121321 is an apocalyptic number.

It is an amenable number.

5244121321 is a deficient number, since it is larger than the sum of its proper divisors (1).

5244121321 is an equidigital number, since it uses as much as digits as its factorization.

5244121321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1920, while the sum is 25.

The square root of 5244121321 is about 72416.3056293263. The cubic root of 5244121321 is about 1737.3643676263.

Adding to 5244121321 its reverse (1231214425), we get a palindrome (6475335746).

The spelling of 5244121321 in words is "five billion, two hundred forty-four million, one hundred twenty-one thousand, three hundred twenty-one".