21352525204207 has 2 divisors, whose sum is σ = 21352525204208. Its totient is φ = 21352525204206.

The previous prime is 21352525204201. The next prime is 21352525204223. The reversal of 21352525204207 is 70240252525312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21352525204207 - 2⁷ = 21352525204079 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21352525204207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21352525204201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10676262602103 + 10676262602104.

It is an arithmetic number, because the mean of its divisors is an integer number (10676262602104).

Almost surely, 2^{21352525204207} is an apocalyptic number.

21352525204207 is a deficient number, since it is larger than the sum of its proper divisors (1).

21352525204207 is an equidigital number, since it uses as much as digits as its factorization.

21352525204207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336000, while the sum is 40.

Adding to 21352525204207 its reverse (70240252525312), we get a palindrome (91592777729519).

The spelling of 21352525204207 in words is "twenty-one trillion, three hundred fifty-two billion, five hundred twenty-five million, two hundred four thousand, two hundred seven".