21214036536607 has 2 divisors, whose sum is σ = 21214036536608. Its totient is φ = 21214036536606.

The previous prime is 21214036536557. The next prime is 21214036536617. The reversal of 21214036536607 is 70663563041212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21214036536607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21214036536617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10607018268303 + 10607018268304.

It is an arithmetic number, because the mean of its divisors is an integer number (10607018268304).

Almost surely, 2^{21214036536607} is an apocalyptic number.

21214036536607 is a deficient number, since it is larger than the sum of its proper divisors (1).

21214036536607 is an equidigital number, since it uses as much as digits as its factorization.

21214036536607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 46.

Adding to 21214036536607 its reverse (70663563041212), we get a palindrome (91877599577819).

The spelling of 21214036536607 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, five hundred thirty-six thousand, six hundred seven".