21033103211 has 2 divisors, whose sum is σ = 21033103212. Its totient is φ = 21033103210.

The previous prime is 21033103207. The next prime is 21033103243. The reversal of 21033103211 is 11230133012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21033103211 - 2² = 21033103207 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21033103211.

It is not a weakly prime, because it can be changed into another prime (21033100211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10516551605 + 10516551606.

It is an arithmetic number, because the mean of its divisors is an integer number (10516551606).

Almost surely, 2^21033103211 is an apocalyptic number.

21033103211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21033103211 is an equidigital number, since it uses as much as digits as its factorization.

21033103211 is an evil number, because the sum of its binary digits is even.

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

Adding to 21033103211 its reverse (11230133012), we get a palindrome (32263236223).

The spelling of 21033103211 in words is "twenty-one billion, thirty-three million, one hundred three thousand, two hundred eleven".