21113130079 has 2 divisors, whose sum is σ = 21113130080. Its totient is φ = 21113130078.

The previous prime is 21113130037. The next prime is 21113130089. The reversal of 21113130079 is 97003131112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21113130079 - 2⁷ = 21113129951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21113130019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556565039 + 10556565040.

It is an arithmetic number, because the mean of its divisors is an integer number (10556565040).

Almost surely, 2^21113130079 is an apocalyptic number.

21113130079 is a deficient number, since it is larger than the sum of its proper divisors (1).

21113130079 is an equidigital number, since it uses as much as digits as its factorization.

21113130079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1134, while the sum is 28.

The spelling of 21113130079 in words is "twenty-one billion, one hundred thirteen million, one hundred thirty thousand, seventy-nine".