12001231010981 has 2 divisors, whose sum is σ = 12001231010982. Its totient is φ = 12001231010980.

The previous prime is 12001231010969. The next prime is 12001231011023. The reversal of 12001231010981 is 18901013210021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8300109142081 + 3701121868900 = 2880991^2 + 1923830^2 .

It is an emirp because it is prime and its reverse (18901013210021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12001231010981 - 2⁴² = 7603184499877 is a prime.

It is a super-2 number, since 2×12001231010981² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12001231010381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6000615505490 + 6000615505491.

It is an arithmetic number, because the mean of its divisors is an integer number (6000615505491).

Almost surely, 2^{12001231010981} is an apocalyptic number.

It is an amenable number.

12001231010981 is a deficient number, since it is larger than the sum of its proper divisors (1).

12001231010981 is an equidigital number, since it uses as much as digits as its factorization.

12001231010981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 29.

The spelling of 12001231010981 in words is "twelve trillion, one billion, two hundred thirty-one million, ten thousand, nine hundred eighty-one".