21335990100697 has 2 divisors, whose sum is σ = 21335990100698. Its totient is φ = 21335990100696.

The previous prime is 21335990100629. The next prime is 21335990100709. The reversal of 21335990100697 is 79600109953312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20980284019776 + 355706080921 = 4580424^2 + 596411^2 .

It is a cyclic number.

It is not a de Polignac number, because 21335990100697 - 2¹⁵ = 21335990067929 is a prime.

It is not a weakly prime, because it can be changed into another prime (21335990100097) 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, 10667995050348 + 10667995050349.

It is an arithmetic number, because the mean of its divisors is an integer number (10667995050349).

Almost surely, 2^{21335990100697} is an apocalyptic number.

It is an amenable number.

21335990100697 is a deficient number, since it is larger than the sum of its proper divisors (1).

21335990100697 is an equidigital number, since it uses as much as digits as its factorization.

21335990100697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2755620, while the sum is 55.

The spelling of 21335990100697 in words is "twenty-one trillion, three hundred thirty-five billion, nine hundred ninety million, one hundred thousand, six hundred ninety-seven".