10021321439 has 2 divisors, whose sum is σ = 10021321440. Its totient is φ = 10021321438.

The previous prime is 10021321391. The next prime is 10021321469. The reversal of 10021321439 is 93412312001.

It is a strong prime.

It is an emirp because it is prime and its reverse (93412312001) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10021321439 is a prime.

It is a super-2 number, since 2×10021321439² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10021321469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010660719 + 5010660720.

It is an arithmetic number, because the mean of its divisors is an integer number (5010660720).

Almost surely, 2^10021321439 is an apocalyptic number.

10021321439 is a deficient number, since it is larger than the sum of its proper divisors (1).

10021321439 is an equidigital number, since it uses as much as digits as its factorization.

10021321439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The spelling of 10021321439 in words is "ten billion, twenty-one million, three hundred twenty-one thousand, four hundred thirty-nine".