13121203 has 2 divisors, whose sum is σ = 13121204. Its totient is φ = 13121202.

The previous prime is 13121159. The next prime is 13121209. The reversal of 13121203 is 30212131.

13121203 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 is an emirp because it is prime and its reverse (30212131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13121203 - 2⁹ = 13120691 is a prime.

It is not a weakly prime, because it can be changed into another prime (13121209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6560601 + 6560602.

It is an arithmetic number, because the mean of its divisors is an integer number (6560602).

Almost surely, 2^13121203 is an apocalyptic number.

13121203 is a deficient number, since it is larger than the sum of its proper divisors (1).

13121203 is an equidigital number, since it uses as much as digits as its factorization.

13121203 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 13.

The square root of 13121203 is about 3622.3201128558. The cubic root of 13121203 is about 235.8619500486.

Adding to 13121203 its reverse (30212131), we get a palindrome (43333334).

The spelling of 13121203 in words is "thirteen million, one hundred twenty-one thousand, two hundred three".