5211412421 has 2 divisors, whose sum is σ = 5211412422. Its totient is φ = 5211412420.

The previous prime is 5211412399. The next prime is 5211412429. The reversal of 5211412421 is 1242141125.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5207209921 + 4202500 = 72161^2 + 2050^2 .

It is a cyclic number.

It is not a de Polignac number, because 5211412421 - 2¹⁰ = 5211411397 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5211412429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2605706210 + 2605706211.

It is an arithmetic number, because the mean of its divisors is an integer number (2605706211).

Almost surely, 2^5211412421 is an apocalyptic number.

It is an amenable number.

5211412421 is a deficient number, since it is larger than the sum of its proper divisors (1).

5211412421 is an equidigital number, since it uses as much as digits as its factorization.

5211412421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 640, while the sum is 23.

The square root of 5211412421 is about 72190.1130418841. The cubic root of 5211412421 is about 1733.7447058087.

Adding to 5211412421 its reverse (1242141125), we get a palindrome (6453553546).

The spelling of 5211412421 in words is "five billion, two hundred eleven million, four hundred twelve thousand, four hundred twenty-one".