1203130121 has 2 divisors, whose sum is σ = 1203130122. Its totient is φ = 1203130120.

The previous prime is 1203130109. The next prime is 1203130139. The reversal of 1203130121 is 1210313021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1199929600 + 3200521 = 34640^2 + 1789^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1203130121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1203130096 and 1203130105.

It is not a weakly prime, because it can be changed into another prime (1203130321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601565060 + 601565061.

It is an arithmetic number, because the mean of its divisors is an integer number (601565061).

Almost surely, 2^1203130121 is an apocalyptic number.

It is an amenable number.

1203130121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1203130121 is an equidigital number, since it uses as much as digits as its factorization.

1203130121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1203130121 is about 34686.1661329124. The cubic root of 1203130121 is about 1063.5817252897.

Adding to 1203130121 its reverse (1210313021), we get a palindrome (2413443142).

The spelling of 1203130121 in words is "one billion, two hundred three million, one hundred thirty thousand, one hundred twenty-one".