5206122757421 has 4 divisors (see below), whose sum is σ = 5206882006332. Its totient is φ = 5205363508512.

The previous prime is 5206122757403. The next prime is 5206122757447. The reversal of 5206122757421 is 1247572216025.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1402507275625 + 3803615481796 = 1184275^2 + 1950286^2 .

It is a cyclic number.

It is not a de Polignac number, because 5206122757421 - 2¹⁴ = 5206122741037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5206122751421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 379614170 + ... + 379627883.

It is an arithmetic number, because the mean of its divisors is an integer number (1301720501583).

Almost surely, 2^{5206122757421} is an apocalyptic number.

It is an amenable number.

5206122757421 is a deficient number, since it is larger than the sum of its proper divisors (759248911).

5206122757421 is an equidigital number, since it uses as much as digits as its factorization.

5206122757421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759248910.

The product of its (nonzero) digits is 470400, while the sum is 44.

The spelling of 5206122757421 in words is "five trillion, two hundred six billion, one hundred twenty-two million, seven hundred fifty-seven thousand, four hundred twenty-one".