21110130049 has 2 divisors, whose sum is σ = 21110130050. Its totient is φ = 21110130048.

The previous prime is 21110130037. The next prime is 21110130053. The reversal of 21110130049 is 94003101112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21087396225 + 22733824 = 145215^2 + 4768^2 .

It is a cyclic number.

It is not a de Polignac number, because 21110130049 - 2⁷ = 21110129921 is a prime.

It is not a weakly prime, because it can be changed into another prime (21110130949) 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, 10555065024 + 10555065025.

It is an arithmetic number, because the mean of its divisors is an integer number (10555065025).

Almost surely, 2^21110130049 is an apocalyptic number.

It is an amenable number.

21110130049 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110130049 is an equidigital number, since it uses as much as digits as its factorization.

21110130049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 22.

The spelling of 21110130049 in words is "twenty-one billion, one hundred ten million, one hundred thirty thousand, forty-nine".