12103012981 has 2 divisors, whose sum is σ = 12103012982. Its totient is φ = 12103012980.

The previous prime is 12103012973. The next prime is 12103013029. The reversal of 12103012981 is 18921030121.

12103012981 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., 6970580100 + 5132432881 = 83490^2 + 71641^2 .

It is a cyclic number.

It is not a de Polignac number, because 12103012981 - 2³ = 12103012973 is a prime.

It is a super-2 number, since 2×12103012981² (a number of 21 digits) contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12103012381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6051506490 + 6051506491.

It is an arithmetic number, because the mean of its divisors is an integer number (6051506491).

Almost surely, 2^12103012981 is an apocalyptic number.

It is an amenable number.

12103012981 is a deficient number, since it is larger than the sum of its proper divisors (1).

12103012981 is an equidigital number, since it uses as much as digits as its factorization.

12103012981 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 28.

The spelling of 12103012981 in words is "twelve billion, one hundred three million, twelve thousand, nine hundred eighty-one".