127320698821 has 2 divisors, whose sum is σ = 127320698822. Its totient is φ = 127320698820.

The previous prime is 127320698803. The next prime is 127320698887. The reversal of 127320698821 is 128896023721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96988644900 + 30332053921 = 311430^2 + 174161^2 .

It is a cyclic number.

It is not a de Polignac number, because 127320698821 - 2²⁹ = 126783827909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127320698801) 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, 63660349410 + 63660349411.

It is an arithmetic number, because the mean of its divisors is an integer number (63660349411).

Almost surely, 2^127320698821 is an apocalyptic number.

It is an amenable number.

127320698821 is a deficient number, since it is larger than the sum of its proper divisors (1).

127320698821 is an equidigital number, since it uses as much as digits as its factorization.

127320698821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 580608, while the sum is 49.

The spelling of 127320698821 in words is "one hundred twenty-seven billion, three hundred twenty million, six hundred ninety-eight thousand, eight hundred twenty-one".