5122788821 has 2 divisors, whose sum is σ = 5122788822. Its totient is φ = 5122788820.

The previous prime is 5122788809. The next prime is 5122788841. The reversal of 5122788821 is 1288872215.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2882186596 + 2240602225 = 53686^2 + 47335^2 .

It is a cyclic number.

It is not a de Polignac number, because 5122788821 - 2²² = 5118594517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5122788841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2561394410 + 2561394411.

It is an arithmetic number, because the mean of its divisors is an integer number (2561394411).

Almost surely, 2^5122788821 is an apocalyptic number.

It is an amenable number.

5122788821 is a deficient number, since it is larger than the sum of its proper divisors (1).

5122788821 is an equidigital number, since it uses as much as digits as its factorization.

5122788821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 143360, while the sum is 44.

The square root of 5122788821 is about 71573.6601062151. The cubic root of 5122788821 is about 1723.8606292203.

The spelling of 5122788821 in words is "five billion, one hundred twenty-two million, seven hundred eighty-eight thousand, eight hundred twenty-one".