5121411821 has 2 divisors, whose sum is σ = 5121411822. Its totient is φ = 5121411820.

The previous prime is 5121411811. The next prime is 5121411847. The reversal of 5121411821 is 1281141215.

It is an a-pointer prime, because the next prime (5121411847) can be obtained adding 5121411821 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4908543721 + 212868100 = 70061^2 + 14590^2 .

It is a cyclic number.

It is not a de Polignac number, because 5121411821 - 2¹⁰ = 5121410797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5121411811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2560705910 + 2560705911.

It is an arithmetic number, because the mean of its divisors is an integer number (2560705911).

Almost surely, 2^5121411821 is an apocalyptic number.

It is an amenable number.

5121411821 is a deficient number, since it is larger than the sum of its proper divisors (1).

5121411821 is an equidigital number, since it uses as much as digits as its factorization.

5121411821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 640, while the sum is 26.

The square root of 5121411821 is about 71564.0399991504. The cubic root of 5121411821 is about 1723.7061580987.

The spelling of 5121411821 in words is "five billion, one hundred twenty-one million, four hundred eleven thousand, eight hundred twenty-one".