12706339981 has 2 divisors, whose sum is σ = 12706339982. Its totient is φ = 12706339980.

The previous prime is 12706339931. The next prime is 12706339991. The reversal of 12706339981 is 18993360721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9582647881 + 3123692100 = 97891^2 + 55890^2 .

It is a cyclic number.

It is not a de Polignac number, because 12706339981 - 2⁹ = 12706339469 is a prime.

It is a super-2 number, since 2×12706339981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12706339931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6353169990 + 6353169991.

It is an arithmetic number, because the mean of its divisors is an integer number (6353169991).

Almost surely, 2^12706339981 is an apocalyptic number.

It is an amenable number.

12706339981 is a deficient number, since it is larger than the sum of its proper divisors (1).

12706339981 is an equidigital number, since it uses as much as digits as its factorization.

12706339981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 49.

The spelling of 12706339981 in words is "twelve billion, seven hundred six million, three hundred thirty-nine thousand, nine hundred eighty-one".