421121203 has 2 divisors, whose sum is σ = 421121204. Its totient is φ = 421121202.

The previous prime is 421121179. The next prime is 421121219. The reversal of 421121203 is 302121124.

It is an a-pointer prime, because the next prime (421121219) can be obtained adding 421121203 to its sum of digits (16).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421121203 - 2⁹ = 421120691 is a prime.

It is not a weakly prime, because it can be changed into another prime (421121303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210560601 + 210560602.

It is an arithmetic number, because the mean of its divisors is an integer number (210560602).

Almost surely, 2^421121203 is an apocalyptic number.

421121203 is a deficient number, since it is larger than the sum of its proper divisors (1).

421121203 is an equidigital number, since it uses as much as digits as its factorization.

421121203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 421121203 is about 20521.2378525273. The cubic root of 421121203 is about 749.5530391691.

Adding to 421121203 its reverse (302121124), we get a palindrome (723242327).

The spelling of 421121203 in words is "four hundred twenty-one million, one hundred twenty-one thousand, two hundred three".