5221216129 has 2 divisors, whose sum is σ = 5221216130. Its totient is φ = 5221216128.

The previous prime is 5221216123. The next prime is 5221216153. The reversal of 5221216129 is 9216121225.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4241526129 + 979690000 = 65127^2 + 31300^2 .

It is a cyclic number.

It is not a de Polignac number, because 5221216129 - 2¹¹ = 5221214081 is a prime.

It is a super-2 number, since 2×5221216129² = 54522195731459489282, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 5221216129.

It is not a weakly prime, because it can be changed into another prime (5221216123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2610608064 + 2610608065.

It is an arithmetic number, because the mean of its divisors is an integer number (2610608065).

Almost surely, 2^5221216129 is an apocalyptic number.

It is an amenable number.

5221216129 is a deficient number, since it is larger than the sum of its proper divisors (1).

5221216129 is an equidigital number, since it uses as much as digits as its factorization.

5221216129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 31.

The square root of 5221216129 is about 72257.9831506526. The cubic root of 5221216129 is about 1734.8311981877.

The spelling of 5221216129 in words is "five billion, two hundred twenty-one million, two hundred sixteen thousand, one hundred twenty-nine".