21002203221211 has 2 divisors, whose sum is σ = 21002203221212. Its totient is φ = 21002203221210.

The previous prime is 21002203221179. The next prime is 21002203221227. The reversal of 21002203221211 is 11212230220012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21002203221211 - 2⁵ = 21002203221179 is a prime.

It is not a weakly prime, because it can be changed into another prime (21002203221281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501101610605 + 10501101610606.

It is an arithmetic number, because the mean of its divisors is an integer number (10501101610606).

Almost surely, 2^{21002203221211} is an apocalyptic number.

21002203221211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002203221211 is an equidigital number, since it uses as much as digits as its factorization.

21002203221211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21002203221211 its reverse (11212230220012), we get a palindrome (32214433441223).

The spelling of 21002203221211 in words is "twenty-one trillion, two billion, two hundred three million, two hundred twenty-one thousand, two hundred eleven".