203421112003 has 2 divisors, whose sum is σ = 203421112004. Its totient is φ = 203421112002.

The previous prime is 203421111991. The next prime is 203421112021. The reversal of 203421112003 is 300211124302.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203421112003 is a prime.

It is not a weakly prime, because it can be changed into another prime (203421112033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101710556001 + 101710556002.

It is an arithmetic number, because the mean of its divisors is an integer number (101710556002).

Almost surely, 2^203421112003 is an apocalyptic number.

203421112003 is a deficient number, since it is larger than the sum of its proper divisors (1).

203421112003 is an equidigital number, since it uses as much as digits as its factorization.

203421112003 is an evil number, because the sum of its binary digits is even.

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

Adding to 203421112003 its reverse (300211124302), we get a palindrome (503632236305).

The spelling of 203421112003 in words is "two hundred three billion, four hundred twenty-one million, one hundred twelve thousand, three".