21433100203 has 2 divisors, whose sum is σ = 21433100204. Its totient is φ = 21433100202.

The previous prime is 21433100197. The next prime is 21433100207. The reversal of 21433100203 is 30200133412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21433100203 - 2⁹ = 21433099691 is a prime.

It is not a weakly prime, because it can be changed into another prime (21433100207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10716550101 + 10716550102.

It is an arithmetic number, because the mean of its divisors is an integer number (10716550102).

Almost surely, 2^21433100203 is an apocalyptic number.

21433100203 is a deficient number, since it is larger than the sum of its proper divisors (1).

21433100203 is an equidigital number, since it uses as much as digits as its factorization.

21433100203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21433100203 its reverse (30200133412), we get a palindrome (51633233615).

The spelling of 21433100203 in words is "twenty-one billion, four hundred thirty-three million, one hundred thousand, two hundred three".