1213125203 has 2 divisors, whose sum is σ = 1213125204. Its totient is φ = 1213125202.

The previous prime is 1213125163. The next prime is 1213125217. The reversal of 1213125203 is 3025213121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1213125203 - 2³⁰ = 139383379 is a prime.

It is not a weakly prime, because it can be changed into another prime (1213145203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606562601 + 606562602.

It is an arithmetic number, because the mean of its divisors is an integer number (606562602).

Almost surely, 2^1213125203 is an apocalyptic number.

1213125203 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213125203 is an equidigital number, since it uses as much as digits as its factorization.

1213125203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1213125203 is about 34829.9469278953. The cubic root of 1213125203 is about 1066.5188649484.

Adding to 1213125203 its reverse (3025213121), we get a palindrome (4238338324).

The spelling of 1213125203 in words is "one billion, two hundred thirteen million, one hundred twenty-five thousand, two hundred three".