5129990221 has 2 divisors, whose sum is σ = 5129990222. Its totient is φ = 5129990220.

The previous prime is 5129990179. The next prime is 5129990249. The reversal of 5129990221 is 1220999215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4349402500 + 780587721 = 65950^2 + 27939^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5129990221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5129990321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2564995110 + 2564995111.

It is an arithmetic number, because the mean of its divisors is an integer number (2564995111).

Almost surely, 2^5129990221 is an apocalyptic number.

It is an amenable number.

5129990221 is a deficient number, since it is larger than the sum of its proper divisors (1).

5129990221 is an equidigital number, since it uses as much as digits as its factorization.

5129990221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 40.

The square root of 5129990221 is about 71623.9500516412. The cubic root of 5129990221 is about 1724.6680278063.

The spelling of 5129990221 in words is "five billion, one hundred twenty-nine million, nine hundred ninety thousand, two hundred twenty-one".