1003103219981 has 2 divisors, whose sum is σ = 1003103219982. Its totient is φ = 1003103219980.

The previous prime is 1003103219917. The next prime is 1003103220011. The reversal of 1003103219981 is 1899123013001.

1003103219981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 828571447081 + 174531772900 = 910259^2 + 417770^2 .

It is an emirp because it is prime and its reverse (1899123013001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1003103219981 - 2⁶ = 1003103219917 is a prime.

It is a super-2 number, since 2×1003103219981² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1003103219381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501551609990 + 501551609991.

It is an arithmetic number, because the mean of its divisors is an integer number (501551609991).

Almost surely, 2^{1003103219981} is an apocalyptic number.

It is an amenable number.

1003103219981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1003103219981 is an equidigital number, since it uses as much as digits as its factorization.

1003103219981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 38.

The spelling of 1003103219981 in words is "one trillion, three billion, one hundred three million, two hundred nineteen thousand, nine hundred eighty-one".