21242996046697 has 2 divisors, whose sum is σ = 21242996046698. Its totient is φ = 21242996046696.

The previous prime is 21242996046673. The next prime is 21242996046731. The reversal of 21242996046697 is 79664069924212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15132909130816 + 6110086915881 = 3890104^2 + 2471859^2 .

It is a cyclic number.

It is not a de Polignac number, because 21242996046697 - 2³⁹ = 20693240232809 is a prime.

It is not a weakly prime, because it can be changed into another prime (21242996046617) 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, 10621498023348 + 10621498023349.

It is an arithmetic number, because the mean of its divisors is an integer number (10621498023349).

Almost surely, 2^{21242996046697} is an apocalyptic number.

It is an amenable number.

21242996046697 is a deficient number, since it is larger than the sum of its proper divisors (1).

21242996046697 is an equidigital number, since it uses as much as digits as its factorization.

21242996046697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141087744, while the sum is 67.

The spelling of 21242996046697 in words is "twenty-one trillion, two hundred forty-two billion, nine hundred ninety-six million, forty-six thousand, six hundred ninety-seven".