105310021393 has 2 divisors, whose sum is σ = 105310021394. Its totient is φ = 105310021392.

The previous prime is 105310021339. The next prime is 105310021441. The reversal of 105310021393 is 393120013501.

Together with previous prime (105310021339) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102414720529 + 2895300864 = 320023^2 + 53808^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105310021393 is a prime.

It is a super-2 number, since 2×105310021393² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (105310021303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52655010696 + 52655010697.

It is an arithmetic number, because the mean of its divisors is an integer number (52655010697).

Almost surely, 2^105310021393 is an apocalyptic number.

It is an amenable number.

105310021393 is a deficient number, since it is larger than the sum of its proper divisors (1).

105310021393 is an equidigital number, since it uses as much as digits as its factorization.

105310021393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430, while the sum is 28.

Adding to 105310021393 its reverse (393120013501), we get a palindrome (498430034894).

The spelling of 105310021393 in words is "one hundred five billion, three hundred ten million, twenty-one thousand, three hundred ninety-three".