821466697127 has 2 divisors, whose sum is σ = 821466697128. Its totient is φ = 821466697126.

The previous prime is 821466697097. The next prime is 821466697147. The reversal of 821466697127 is 721796664128.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 821466697127 - 2²⁰ = 821465648551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (821466697147) 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, 410733348563 + 410733348564.

It is an arithmetic number, because the mean of its divisors is an integer number (410733348564).

Almost surely, 2^821466697127 is an apocalyptic number.

821466697127 is a deficient number, since it is larger than the sum of its proper divisors (1).

821466697127 is an equidigital number, since it uses as much as digits as its factorization.

821466697127 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12192768, while the sum is 59.

The spelling of 821466697127 in words is "eight hundred twenty-one billion, four hundred sixty-six million, six hundred ninety-seven thousand, one hundred twenty-seven".