21130034300447 has 2 divisors, whose sum is σ = 21130034300448. Its totient is φ = 21130034300446.

The previous prime is 21130034300387. The next prime is 21130034300461. The reversal of 21130034300447 is 74400343003112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21130034300447 - 2⁸ = 21130034300191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21130034300467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10565017150223 + 10565017150224.

It is an arithmetic number, because the mean of its divisors is an integer number (10565017150224).

Almost surely, 2^{21130034300447} is an apocalyptic number.

21130034300447 is a deficient number, since it is larger than the sum of its proper divisors (1).

21130034300447 is an equidigital number, since it uses as much as digits as its factorization.

21130034300447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 32.

Adding to 21130034300447 its reverse (74400343003112), we get a palindrome (95530377303559).

The spelling of 21130034300447 in words is "twenty-one trillion, one hundred thirty billion, thirty-four million, three hundred thousand, four hundred forty-seven".