5051213021321 has 2 divisors, whose sum is σ = 5051213021322. Its totient is φ = 5051213021320.

The previous prime is 5051213021303. The next prime is 5051213021363. The reversal of 5051213021321 is 1231203121505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2764691005696 + 2286522015625 = 1662736^2 + 1512125^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5051213021321 is a prime.

It is not a weakly prime, because it can be changed into another prime (5051213027321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2525606510660 + 2525606510661.

It is an arithmetic number, because the mean of its divisors is an integer number (2525606510661).

Almost surely, 2^{5051213021321} is an apocalyptic number.

It is an amenable number.

5051213021321 is a deficient number, since it is larger than the sum of its proper divisors (1).

5051213021321 is an equidigital number, since it uses as much as digits as its factorization.

5051213021321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 26.

Adding to 5051213021321 its reverse (1231203121505), we get a palindrome (6282416142826).

The spelling of 5051213021321 in words is "five trillion, fifty-one billion, two hundred thirteen million, twenty-one thousand, three hundred twenty-one".