21113013079 has 2 divisors, whose sum is σ = 21113013080. Its totient is φ = 21113013078.

The previous prime is 21113013071. The next prime is 21113013083. The reversal of 21113013079 is 97031031112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21113013079 - 2³ = 21113013071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21113013071) 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, 10556506539 + 10556506540.

It is an arithmetic number, because the mean of its divisors is an integer number (10556506540).

Almost surely, 2^21113013079 is an apocalyptic number.

21113013079 is a deficient number, since it is larger than the sum of its proper divisors (1).

21113013079 is an equidigital number, since it uses as much as digits as its factorization.

21113013079 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 21113013079 in words is "twenty-one billion, one hundred thirteen million, thirteen thousand, seventy-nine".