21352525200991 has 2 divisors, whose sum is σ = 21352525200992. Its totient is φ = 21352525200990.

The previous prime is 21352525200977. The next prime is 21352525201001. The reversal of 21352525200991 is 19900252525312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21352525200991 - 2⁴¹ = 19153501945439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21352525200931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10676262600495 + 10676262600496.

It is an arithmetic number, because the mean of its divisors is an integer number (10676262600496).

Almost surely, 2^{21352525200991} is an apocalyptic number.

21352525200991 is a deficient number, since it is larger than the sum of its proper divisors (1).

21352525200991 is an equidigital number, since it uses as much as digits as its factorization.

21352525200991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486000, while the sum is 46.

The spelling of 21352525200991 in words is "twenty-one trillion, three hundred fifty-two billion, five hundred twenty-five million, two hundred thousand, nine hundred ninety-one".