21103200203 has 2 divisors, whose sum is σ = 21103200204. Its totient is φ = 21103200202.

The previous prime is 21103200199. The next prime is 21103200229. The reversal of 21103200203 is 30200230112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21103200203 - 2² = 21103200199 is a prime.

It is not a weakly prime, because it can be changed into another prime (21103200253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551600101 + 10551600102.

It is an arithmetic number, because the mean of its divisors is an integer number (10551600102).

Almost surely, 2^21103200203 is an apocalyptic number.

21103200203 is a deficient number, since it is larger than the sum of its proper divisors (1).

21103200203 is an equidigital number, since it uses as much as digits as its factorization.

21103200203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21103200203 its reverse (30200230112), we get a palindrome (51303430315).

The spelling of 21103200203 in words is "twenty-one billion, one hundred three million, two hundred thousand, two hundred three".