21211100021203 has 2 divisors, whose sum is σ = 21211100021204. Its totient is φ = 21211100021202.

The previous prime is 21211100021147. The next prime is 21211100021207. The reversal of 21211100021203 is 30212000111212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21211100021203 - 2¹³ = 21211100013011 is a prime.

It is not a weakly prime, because it can be changed into another prime (21211100021207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605550010601 + 10605550010602.

It is an arithmetic number, because the mean of its divisors is an integer number (10605550010602).

Almost surely, 2^{21211100021203} is an apocalyptic number.

21211100021203 is a deficient number, since it is larger than the sum of its proper divisors (1).

21211100021203 is an equidigital number, since it uses as much as digits as its factorization.

21211100021203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21211100021203 its reverse (30212000111212), we get a palindrome (51423100132415).

Subtracting 21211100021203 from its reverse (30212000111212), we obtain a palindrome (9000900090009).

The spelling of 21211100021203 in words is "twenty-one trillion, two hundred eleven billion, one hundred million, twenty-one thousand, two hundred three".