121431203 has 2 divisors, whose sum is σ = 121431204. Its totient is φ = 121431202.

The previous prime is 121431199. The next prime is 121431239. The reversal of 121431203 is 302134121.

It is a weak prime.

It is an emirp because it is prime and its reverse (302134121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121431203 - 2² = 121431199 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (121431103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60715601 + 60715602.

It is an arithmetic number, because the mean of its divisors is an integer number (60715602).

Almost surely, 2^121431203 is an apocalyptic number.

121431203 is a deficient number, since it is larger than the sum of its proper divisors (1).

121431203 is an equidigital number, since it uses as much as digits as its factorization.

121431203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 121431203 is about 11019.5827053478. The cubic root of 121431203 is about 495.1955870964.

Adding to 121431203 its reverse (302134121), we get a palindrome (423565324).

The spelling of 121431203 in words is "one hundred twenty-one million, four hundred thirty-one thousand, two hundred three".