5121421513345 has 4 divisors (see below), whose sum is σ = 6145705816020. Its totient is φ = 4097137210672.

The previous prime is 5121421513303. The next prime is 5121421513349. The reversal of 5121421513345 is 5433151241215.

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 2799735444081 + 2321686069264 = 1673241^2 + 1523708^2 .

It is a cyclic number.

It is not a de Polignac number, because 5121421513345 - 2¹⁵ = 5121421480577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5121421513349) 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, 512142151330 + ... + 512142151339.

It is an arithmetic number, because the mean of its divisors is an integer number (1536426454005).

Almost surely, 2^{5121421513345} is an apocalyptic number.

It is an amenable number.

5121421513345 is a deficient number, since it is larger than the sum of its proper divisors (1024284302675).

5121421513345 is a wasteful number, since it uses less digits than its factorization.

5121421513345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024284302674.

The product of its digits is 72000, while the sum is 37.

The spelling of 5121421513345 in words is "five trillion, one hundred twenty-one billion, four hundred twenty-one million, five hundred thirteen thousand, three hundred forty-five".