21113013203 has 2 divisors, whose sum is σ = 21113013204. Its totient is φ = 21113013202.

The previous prime is 21113013197. The next prime is 21113013241. The reversal of 21113013203 is 30231031112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21113013203 - 2²⁴ = 21096235987 is a prime.

It is not a weakly prime, because it can be changed into another prime (21113013253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556506601 + 10556506602.

It is an arithmetic number, because the mean of its divisors is an integer number (10556506602).

Almost surely, 2^21113013203 is an apocalyptic number.

21113013203 is a deficient number, since it is larger than the sum of its proper divisors (1).

21113013203 is an equidigital number, since it uses as much as digits as its factorization.

21113013203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21113013203 its reverse (30231031112), we get a palindrome (51344044315).

The spelling of 21113013203 in words is "twenty-one billion, one hundred thirteen million, thirteen thousand, two hundred three".