21014512238641 has 2 divisors, whose sum is σ = 21014512238642. Its totient is φ = 21014512238640.

The previous prime is 21014512238617. The next prime is 21014512238677. The reversal of 21014512238641 is 14683221541012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17947898358016 + 3066613880625 = 4236496^2 + 1751175^2 .

It is a cyclic number.

It is not a de Polignac number, because 21014512238641 - 2⁹ = 21014512238129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21014512238594 and 21014512238603.

It is not a weakly prime, because it can be changed into another prime (21014512238341) 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, 10507256119320 + 10507256119321.

It is an arithmetic number, because the mean of its divisors is an integer number (10507256119321).

Almost surely, 2^{21014512238641} is an apocalyptic number.

It is an amenable number.

21014512238641 is a deficient number, since it is larger than the sum of its proper divisors (1).

21014512238641 is an equidigital number, since it uses as much as digits as its factorization.

21014512238641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 92160, while the sum is 40.

Adding to 21014512238641 its reverse (14683221541012), we get a palindrome (35697733779653).

The spelling of 21014512238641 in words is "twenty-one trillion, fourteen billion, five hundred twelve million, two hundred thirty-eight thousand, six hundred forty-one".