1000203003161 has 2 divisors, whose sum is σ = 1000203003162. Its totient is φ = 1000203003160.

The previous prime is 1000203003143. The next prime is 1000203003179. The reversal of 1000203003161 is 1613003020001.

1000203003161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (1000203003143) and next prime (1000203003179).

It can be written as a sum of positive squares in only one way, i.e., 990413088025 + 9789915136 = 995195^2 + 98944^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000203003161 - 2⁶ = 1000203003097 is a prime.

It is not a weakly prime, because it can be changed into another prime (1000203003101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500101501580 + 500101501581.

It is an arithmetic number, because the mean of its divisors is an integer number (500101501581).

Almost surely, 2^{1000203003161} is an apocalyptic number.

It is an amenable number.

1000203003161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000203003161 is an equidigital number, since it uses as much as digits as its factorization.

1000203003161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 1000203003161 its reverse (1613003020001), we get a palindrome (2613206023162).

The spelling of 1000203003161 in words is "one trillion, two hundred three million, three thousand, one hundred sixty-one".