21241200044087 has 2 divisors, whose sum is σ = 21241200044088. Its totient is φ = 21241200044086.

The previous prime is 21241200043979. The next prime is 21241200044101. The reversal of 21241200044087 is 78044000214212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21241200044087 - 2¹⁸ = 21241199781943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21241280044087) 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, 10620600022043 + 10620600022044.

It is an arithmetic number, because the mean of its divisors is an integer number (10620600022044).

Almost surely, 2^{21241200044087} is an apocalyptic number.

21241200044087 is a deficient number, since it is larger than the sum of its proper divisors (1).

21241200044087 is an equidigital number, since it uses as much as digits as its factorization.

21241200044087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28672, while the sum is 35.

Adding to 21241200044087 its reverse (78044000214212), we get a palindrome (99285200258299).

The spelling of 21241200044087 in words is "twenty-one trillion, two hundred forty-one billion, two hundred million, forty-four thousand, eighty-seven".