21334210242047 has 2 divisors, whose sum is σ = 21334210242048. Its totient is φ = 21334210242046.

The previous prime is 21334210241983. The next prime is 21334210242053. The reversal of 21334210242047 is 74024201243312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21334210242047 - 2⁶ = 21334210241983 is a prime.

It is a super-2 number, since 2×21334210242047² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21334210241998 and 21334210242016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21334210242347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10667105121023 + 10667105121024.

It is an arithmetic number, because the mean of its divisors is an integer number (10667105121024).

Almost surely, 2^{21334210242047} is an apocalyptic number.

21334210242047 is a deficient number, since it is larger than the sum of its proper divisors (1).

21334210242047 is an equidigital number, since it uses as much as digits as its factorization.

21334210242047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 35.

Adding to 21334210242047 its reverse (74024201243312), we get a palindrome (95358411485359).

The spelling of 21334210242047 in words is "twenty-one trillion, three hundred thirty-four billion, two hundred ten million, two hundred forty-two thousand, forty-seven".