12002221109981 has 2 divisors, whose sum is σ = 12002221109982. Its totient is φ = 12002221109980.

The previous prime is 12002221109953. The next prime is 12002221110031. The reversal of 12002221109981 is 18990112220021.

12002221109981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11993345585881 + 8875524100 = 3463141^2 + 94210^2 .

It is a cyclic number.

It is not a de Polignac number, because 12002221109981 - 2³⁴ = 11985041240797 is a prime.

It is a super-2 number, since 2×12002221109981² (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 (12002221109941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6001110554990 + 6001110554991.

It is an arithmetic number, because the mean of its divisors is an integer number (6001110554991).

Almost surely, 2^{12002221109981} is an apocalyptic number.

It is an amenable number.

12002221109981 is a deficient number, since it is larger than the sum of its proper divisors (1).

12002221109981 is an equidigital number, since it uses as much as digits as its factorization.

12002221109981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 38.

The spelling of 12002221109981 in words is "twelve trillion, two billion, two hundred twenty-one million, one hundred nine thousand, nine hundred eighty-one".