21110301193 has 2 divisors, whose sum is σ = 21110301194. Its totient is φ = 21110301192.

The previous prime is 21110301143. The next prime is 21110301307. The reversal of 21110301193 is 39110301112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19040688144 + 2069613049 = 137988^2 + 45493^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21110301193 is a prime.

It is not a weakly prime, because it can be changed into another prime (21110301143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555150596 + 10555150597.

It is an arithmetic number, because the mean of its divisors is an integer number (10555150597).

Almost surely, 2^21110301193 is an apocalyptic number.

It is an amenable number.

21110301193 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110301193 is an equidigital number, since it uses as much as digits as its factorization.

21110301193 is an evil number, because the sum of its binary digits is even.

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

The spelling of 21110301193 in words is "twenty-one billion, one hundred ten million, three hundred one thousand, one hundred ninety-three".