12011120209981 has 2 divisors, whose sum is σ = 12011120209982. Its totient is φ = 12011120209980.

The previous prime is 12011120209967. The next prime is 12011120210069. The reversal of 12011120209981 is 18990202111021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10554896368900 + 1456223841081 = 3248830^2 + 1206741^2 .

It is a cyclic number.

It is not a de Polignac number, because 12011120209981 - 2¹³ = 12011120201789 is a prime.

It is a super-2 number, since 2×12011120209981² (a number of 27 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 12011120209981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12011120279981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6005560104990 + 6005560104991.

It is an arithmetic number, because the mean of its divisors is an integer number (6005560104991).

Almost surely, 2^{12011120209981} is an apocalyptic number.

It is an amenable number.

12011120209981 is a deficient number, since it is larger than the sum of its proper divisors (1).

12011120209981 is an equidigital number, since it uses as much as digits as its factorization.

12011120209981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 37.

The spelling of 12011120209981 in words is "twelve trillion, eleven billion, one hundred twenty million, two hundred nine thousand, nine hundred eighty-one".