21002103313211 has 2 divisors, whose sum is σ = 21002103313212. Its totient is φ = 21002103313210.

The previous prime is 21002103313199. The next prime is 21002103313273. The reversal of 21002103313211 is 11231330120012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21002103313211 - 2³⁴ = 20984923444027 is a prime.

It is not a weakly prime, because it can be changed into another prime (21002103316211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501051656605 + 10501051656606.

It is an arithmetic number, because the mean of its divisors is an integer number (10501051656606).

Almost surely, 2^{21002103313211} is an apocalyptic number.

21002103313211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002103313211 is an equidigital number, since it uses as much as digits as its factorization.

21002103313211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21002103313211 its reverse (11231330120012), we get a palindrome (32233433433223).

The spelling of 21002103313211 in words is "twenty-one trillion, two billion, one hundred three million, three hundred thirteen thousand, two hundred eleven".