21002002101211 has 8 divisors (see below), whose sum is σ = 21272625678240. Its totient is φ = 20732148436032.

The previous prime is 21002002101187. The next prime is 21002002101263. The reversal of 21002002101211 is 11210120020012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21002002101211 - 2⁹ = 21002002100699 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21002002101191 and 21002002101200.

It is not an unprimeable number, because it can be changed into a prime (21002002101271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192423055 + ... + 192532168.

It is an arithmetic number, because the mean of its divisors is an integer number (2659078209780).

Almost surely, 2^{21002002101211} is an apocalyptic number.

21002002101211 is a deficient number, since it is larger than the sum of its proper divisors (270623577029).

21002002101211 is an equidigital number, since it uses as much as digits as its factorization.

21002002101211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384955925.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21002002101211 its reverse (11210120020012), we get a palindrome (32212122121223).

The spelling of 21002002101211 in words is "twenty-one trillion, two billion, two million, one hundred one thousand, two hundred eleven".