21256030411027 has 2 divisors, whose sum is σ = 21256030411028. Its totient is φ = 21256030411026.

The previous prime is 21256030410991. The next prime is 21256030411079. The reversal of 21256030411027 is 72011403065212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21256030411027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21256030410983 and 21256030411001.

It is not a weakly prime, because it can be changed into another prime (21256030411087) 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, 10628015205513 + 10628015205514.

It is an arithmetic number, because the mean of its divisors is an integer number (10628015205514).

Almost surely, 2^{21256030411027} is an apocalyptic number.

21256030411027 is a deficient number, since it is larger than the sum of its proper divisors (1).

21256030411027 is an equidigital number, since it uses as much as digits as its factorization.

21256030411027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 34.

Adding to 21256030411027 its reverse (72011403065212), we get a palindrome (93267433476239).

The spelling of 21256030411027 in words is "twenty-one trillion, two hundred fifty-six billion, thirty million, four hundred eleven thousand, twenty-seven".