5365131221 has 2 divisors, whose sum is σ = 5365131222. Its totient is φ = 5365131220.

The previous prime is 5365131209. The next prime is 5365131241. The reversal of 5365131221 is 1221315635.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5247408721 + 117722500 = 72439^2 + 10850^2 .

It is a cyclic number.

It is not a de Polignac number, because 5365131221 - 2³⁰ = 4291389397 is a prime.

It is a super-3 number, since 3×5365131221³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5365131241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2682565610 + 2682565611.

It is an arithmetic number, because the mean of its divisors is an integer number (2682565611).

Almost surely, 2^5365131221 is an apocalyptic number.

It is an amenable number.

5365131221 is a deficient number, since it is larger than the sum of its proper divisors (1).

5365131221 is an equidigital number, since it uses as much as digits as its factorization.

5365131221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 29.

The square root of 5365131221 is about 73247.0560568819. The cubic root of 5365131221 is about 1750.6263032829.

Adding to 5365131221 its reverse (1221315635), we get a palindrome (6586446856).

The spelling of 5365131221 in words is "five billion, three hundred sixty-five million, one hundred thirty-one thousand, two hundred twenty-one".