21214036536677 has 2 divisors, whose sum is σ = 21214036536678. Its totient is φ = 21214036536676.

The previous prime is 21214036536617. The next prime is 21214036536689. The reversal of 21214036536677 is 77663563041212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12843436083076 + 8370600453601 = 3583774^2 + 2893199^2 .

It is a cyclic number.

It is not a de Polignac number, because 21214036536677 - 2¹⁸ = 21214036274533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21214036536607) 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, 10607018268338 + 10607018268339.

It is an arithmetic number, because the mean of its divisors is an integer number (10607018268339).

Almost surely, 2^{21214036536677} is an apocalyptic number.

It is an amenable number.

21214036536677 is a deficient number, since it is larger than the sum of its proper divisors (1).

21214036536677 is an equidigital number, since it uses as much as digits as its factorization.

21214036536677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7620480, while the sum is 53.

Adding to 21214036536677 its reverse (77663563041212), we get a palindrome (98877599577889).

The spelling of 21214036536677 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, five hundred thirty-six thousand, six hundred seventy-seven".