21241522343047 has 2 divisors, whose sum is σ = 21241522343048. Its totient is φ = 21241522343046.

The previous prime is 21241522343009. The next prime is 21241522343051. The reversal of 21241522343047 is 74034322514212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21241522343047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21241522343147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10620761171523 + 10620761171524.

It is an arithmetic number, because the mean of its divisors is an integer number (10620761171524).

Almost surely, 2^{21241522343047} is an apocalyptic number.

21241522343047 is a deficient number, since it is larger than the sum of its proper divisors (1).

21241522343047 is an equidigital number, since it uses as much as digits as its factorization.

21241522343047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 322560, while the sum is 40.

Adding to 21241522343047 its reverse (74034322514212), we get a palindrome (95275844857259).

The spelling of 21241522343047 in words is "twenty-one trillion, two hundred forty-one billion, five hundred twenty-two million, three hundred forty-three thousand, forty-seven".