21214036516487 has 2 divisors, whose sum is σ = 21214036516488. Its totient is φ = 21214036516486.

The previous prime is 21214036516373. The next prime is 21214036516489. The reversal of 21214036516487 is 78461563041212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21214036516487 - 2¹⁴ = 21214036500103 is a prime.

It is a super-3 number, since 3×21214036516487³ (a number of 41 digits) contains 333 as substring.

Together with 21214036516489, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21214036516489) 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, 10607018258243 + 10607018258244.

It is an arithmetic number, because the mean of its divisors is an integer number (10607018258244).

Almost surely, 2^{21214036516487} is an apocalyptic number.

21214036516487 is a deficient number, since it is larger than the sum of its proper divisors (1).

21214036516487 is an equidigital number, since it uses as much as digits as its factorization.

21214036516487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1935360, while the sum is 50.

Adding to 21214036516487 its reverse (78461563041212), we get a palindrome (99675599557699).

The spelling of 21214036516487 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, five hundred sixteen thousand, four hundred eighty-seven".