2126221393 has 2 divisors, whose sum is σ = 2126221394. Its totient is φ = 2126221392.

The previous prime is 2126221379. The next prime is 2126221403. The reversal of 2126221393 is 3931226212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2120326209 + 5895184 = 46047^2 + 2428^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2126221393 is a prime.

It is not a weakly prime, because it can be changed into another prime (2126221693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1063110696 + 1063110697.

It is an arithmetic number, because the mean of its divisors is an integer number (1063110697).

Almost surely, 2^2126221393 is an apocalyptic number.

It is an amenable number.

2126221393 is a deficient number, since it is larger than the sum of its proper divisors (1).

2126221393 is an equidigital number, since it uses as much as digits as its factorization.

2126221393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 31.

The square root of 2126221393 is about 46110.9682505150. The cubic root of 2126221393 is about 1285.8870654332.

The spelling of 2126221393 in words is "two billion, one hundred twenty-six million, two hundred twenty-one thousand, three hundred ninety-three".