21250416323611 has 2 divisors, whose sum is σ = 21250416323612. Its totient is φ = 21250416323610.

The previous prime is 21250416323561. The next prime is 21250416323627. The reversal of 21250416323611 is 11632361405212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21250416323611 - 2¹⁹ = 21250415799323 is a prime.

It is not a weakly prime, because it can be changed into another prime (21250416323671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10625208161805 + 10625208161806.

It is an arithmetic number, because the mean of its divisors is an integer number (10625208161806).

Almost surely, 2^{21250416323611} is an apocalyptic number.

21250416323611 is a deficient number, since it is larger than the sum of its proper divisors (1).

21250416323611 is an equidigital number, since it uses as much as digits as its factorization.

21250416323611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 37.

Adding to 21250416323611 its reverse (11632361405212), we get a palindrome (32882777728823).

The spelling of 21250416323611 in words is "twenty-one trillion, two hundred fifty billion, four hundred sixteen million, three hundred twenty-three thousand, six hundred eleven".