21101310103333 has 2 divisors, whose sum is σ = 21101310103334. Its totient is φ = 21101310103332.

The previous prime is 21101310103331. The next prime is 21101310103339. The reversal of 21101310103333 is 33330101310112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17746192540129 + 3355117563204 = 4212623^2 + 1831698^2 .

It is a cyclic number.

It is not a de Polignac number, because 21101310103333 - 2¹ = 21101310103331 is a prime.

Together with 21101310103331, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21101310103331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550655051666 + 10550655051667.

It is an arithmetic number, because the mean of its divisors is an integer number (10550655051667).

Almost surely, 2^{21101310103333} is an apocalyptic number.

It is an amenable number.

21101310103333 is a deficient number, since it is larger than the sum of its proper divisors (1).

21101310103333 is an equidigital number, since it uses as much as digits as its factorization.

21101310103333 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 22.

Adding to 21101310103333 its reverse (33330101310112), we get a palindrome (54431411413445).

The spelling of 21101310103333 in words is "twenty-one trillion, one hundred one billion, three hundred ten million, one hundred three thousand, three hundred thirty-three".