21130034300387 has 2 divisors, whose sum is σ = 21130034300388. Its totient is φ = 21130034300386.

The previous prime is 21130034300381. The next prime is 21130034300447. The reversal of 21130034300387 is 78300343003112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21130034300387 - 2²⁸ = 21129765864931 is a prime.

It is a super-2 number, since 2×21130034300387² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21130034300381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10565017150193 + 10565017150194.

It is an arithmetic number, because the mean of its divisors is an integer number (10565017150194).

Almost surely, 2^{21130034300387} is an apocalyptic number.

21130034300387 is a deficient number, since it is larger than the sum of its proper divisors (1).

21130034300387 is an equidigital number, since it uses as much as digits as its factorization.

21130034300387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 35.

Adding to 21130034300387 its reverse (78300343003112), we get a palindrome (99430377303499).

The spelling of 21130034300387 in words is "twenty-one trillion, one hundred thirty billion, thirty-four million, three hundred thousand, three hundred eighty-seven".