21112637713 has 2 divisors, whose sum is σ = 21112637714. Its totient is φ = 21112637712.

The previous prime is 21112637659. The next prime is 21112637771. The reversal of 21112637713 is 31773621112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21051688464 + 60949249 = 145092^2 + 7807^2 .

It is a cyclic number.

It is not a de Polignac number, because 21112637713 - 2¹⁷ = 21112506641 is a prime.

It is not a weakly prime, because it can be changed into another prime (21112637213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556318856 + 10556318857.

It is an arithmetic number, because the mean of its divisors is an integer number (10556318857).

Almost surely, 2^21112637713 is an apocalyptic number.

It is an amenable number.

21112637713 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112637713 is an equidigital number, since it uses as much as digits as its factorization.

21112637713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10584, while the sum is 34.

The spelling of 21112637713 in words is "twenty-one billion, one hundred twelve million, six hundred thirty-seven thousand, seven hundred thirteen".