21352525200491 has 2 divisors, whose sum is σ = 21352525200492. Its totient is φ = 21352525200490.

The previous prime is 21352525200481. The next prime is 21352525200577. The reversal of 21352525200491 is 19400252525312.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21352525200491 is a prime.

It is not a weakly prime, because it can be changed into another prime (21352525200451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10676262600245 + 10676262600246.

It is an arithmetic number, because the mean of its divisors is an integer number (10676262600246).

Almost surely, 2^{21352525200491} is an apocalyptic number.

21352525200491 is a deficient number, since it is larger than the sum of its proper divisors (1).

21352525200491 is an equidigital number, since it uses as much as digits as its factorization.

21352525200491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 21352525200491 in words is "twenty-one trillion, three hundred fifty-two billion, five hundred twenty-five million, two hundred thousand, four hundred ninety-one".