5021420245321 has 2 divisors, whose sum is σ = 5021420245322. Its totient is φ = 5021420245320.

The previous prime is 5021420245253. The next prime is 5021420245343. The reversal of 5021420245321 is 1235420241205.

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., 2809180475721 + 2212239769600 = 1676061^2 + 1487360^2 .

It is a cyclic number.

It is not a de Polignac number, because 5021420245321 - 2¹³ = 5021420237129 is a prime.

It is a super-2 number, since 2×5021420245321² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5021420240321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2510710122660 + 2510710122661.

It is an arithmetic number, because the mean of its divisors is an integer number (2510710122661).

Almost surely, 2^{5021420245321} is an apocalyptic number.

It is an amenable number.

5021420245321 is a deficient number, since it is larger than the sum of its proper divisors (1).

5021420245321 is an equidigital number, since it uses as much as digits as its factorization.

5021420245321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 5021420245321 its reverse (1235420241205), we get a palindrome (6256840486526).

The spelling of 5021420245321 in words is "five trillion, twenty-one billion, four hundred twenty million, two hundred forty-five thousand, three hundred twenty-one".