5015421215921 has 2 divisors, whose sum is σ = 5015421215922. Its totient is φ = 5015421215920.

The previous prime is 5015421215881. The next prime is 5015421215923. The reversal of 5015421215921 is 1295121245105.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2770410447025 + 2245010768896 = 1664455^2 + 1498336^2 .

It is a cyclic number.

It is not a de Polignac number, because 5015421215921 - 2¹⁰ = 5015421214897 is a prime.

It is a super-2 number, since 2×5015421215921² (a number of 26 digits) contains 22 as substring.

Together with 5015421215923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (5015421215923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2507710607960 + 2507710607961.

It is an arithmetic number, because the mean of its divisors is an integer number (2507710607961).

Almost surely, 2^{5015421215921} is an apocalyptic number.

It is an amenable number.

5015421215921 is a deficient number, since it is larger than the sum of its proper divisors (1).

5015421215921 is an equidigital number, since it uses as much as digits as its factorization.

5015421215921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36000, while the sum is 38.

The spelling of 5015421215921 in words is "five trillion, fifteen billion, four hundred twenty-one million, two hundred fifteen thousand, nine hundred twenty-one".