21110130193 has 2 divisors, whose sum is σ = 21110130194. Its totient is φ = 21110130192.

The previous prime is 21110130131. The next prime is 21110130221. The reversal of 21110130193 is 39103101112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16595365329 + 4514764864 = 128823^2 + 67192^2 .

It is a cyclic number.

It is not a de Polignac number, because 21110130193 - 2¹⁷ = 21109999121 is a prime.

It is not a weakly prime, because it can be changed into another prime (21110130893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555065096 + 10555065097.

It is an arithmetic number, because the mean of its divisors is an integer number (10555065097).

Almost surely, 2^21110130193 is an apocalyptic number.

It is an amenable number.

21110130193 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110130193 is an equidigital number, since it uses as much as digits as its factorization.

21110130193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 22.

The spelling of 21110130193 in words is "twenty-one billion, one hundred ten million, one hundred thirty thousand, one hundred ninety-three".