12098579981 has 2 divisors, whose sum is σ = 12098579982. Its totient is φ = 12098579980.

The previous prime is 12098579959. The next prime is 12098579993. The reversal of 12098579981 is 18997589021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9283322500 + 2815257481 = 96350^2 + 53059^2 .

It is a cyclic number.

It is not a de Polignac number, because 12098579981 - 2⁶ = 12098579917 is a prime.

It is a super-2 number, since 2×12098579981² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12098579981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12098579951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6049289990 + 6049289991.

It is an arithmetic number, because the mean of its divisors is an integer number (6049289991).

Almost surely, 2^12098579981 is an apocalyptic number.

It is an amenable number.

12098579981 is a deficient number, since it is larger than the sum of its proper divisors (1).

12098579981 is an equidigital number, since it uses as much as digits as its factorization.

12098579981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3265920, while the sum is 59.

The spelling of 12098579981 in words is "twelve billion, ninety-eight million, five hundred seventy-nine thousand, nine hundred eighty-one".