121203140203 has 2 divisors, whose sum is σ = 121203140204. Its totient is φ = 121203140202.

The previous prime is 121203140189. The next prime is 121203140209. The reversal of 121203140203 is 302041302121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121203140203 - 2⁵ = 121203140171 is a prime.

It is not a weakly prime, because it can be changed into another prime (121203140209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60601570101 + 60601570102.

It is an arithmetic number, because the mean of its divisors is an integer number (60601570102).

Almost surely, 2^121203140203 is an apocalyptic number.

121203140203 is a deficient number, since it is larger than the sum of its proper divisors (1).

121203140203 is an equidigital number, since it uses as much as digits as its factorization.

121203140203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 121203140203 its reverse (302041302121), we get a palindrome (423244442324).

The spelling of 121203140203 in words is "one hundred twenty-one billion, two hundred three million, one hundred forty thousand, two hundred three".