103012009981 has 2 divisors, whose sum is σ = 103012009982. Its totient is φ = 103012009980.

The previous prime is 103012009979. The next prime is 103012010021. The reversal of 103012009981 is 189900210301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64961265625 + 38050744356 = 254875^2 + 195066^2 .

It is a cyclic number.

It is not a de Polignac number, because 103012009981 - 2¹ = 103012009979 is a prime.

It is a super-2 number, since 2×103012009981² (a number of 23 digits) contains 22 as substring.

Together with 103012009979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103012009081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51506004990 + 51506004991.

It is an arithmetic number, because the mean of its divisors is an integer number (51506004991).

Almost surely, 2^103012009981 is an apocalyptic number.

It is an amenable number.

103012009981 is a deficient number, since it is larger than the sum of its proper divisors (1).

103012009981 is an equidigital number, since it uses as much as digits as its factorization.

103012009981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 34.

The spelling of 103012009981 in words is "one hundred three billion, twelve million, nine thousand, nine hundred eighty-one".