21103103133311 has 2 divisors, whose sum is σ = 21103103133312. Its totient is φ = 21103103133310.

The previous prime is 21103103133227. The next prime is 21103103133313. The reversal of 21103103133311 is 11333130130112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21103103133311 is a prime.

Together with 21103103133313, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21103103133313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551551566655 + 10551551566656.

It is an arithmetic number, because the mean of its divisors is an integer number (10551551566656).

Almost surely, 2^{21103103133311} is an apocalyptic number.

21103103133311 is a deficient number, since it is larger than the sum of its proper divisors (1).

21103103133311 is an equidigital number, since it uses as much as digits as its factorization.

21103103133311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 23.

Adding to 21103103133311 its reverse (11333130130112), we get a palindrome (32436233263423).

The spelling of 21103103133311 in words is "twenty-one trillion, one hundred three billion, one hundred three million, one hundred thirty-three thousand, three hundred eleven".