21002133310211 has 4 divisors (see below), whose sum is σ = 22237552916712. Its totient is φ = 19766713703712.

The previous prime is 21002133310189. The next prime is 21002133310259. The reversal of 21002133310211 is 11201333120012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21002133310211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21002133312211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 617709803225 + ... + 617709803258.

It is an arithmetic number, because the mean of its divisors is an integer number (5559388229178).

Almost surely, 2^{21002133310211} is an apocalyptic number.

21002133310211 is a deficient number, since it is larger than the sum of its proper divisors (1235419606501).

21002133310211 is a wasteful number, since it uses less digits than its factorization.

21002133310211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235419606500.

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

Adding to 21002133310211 its reverse (11201333120012), we get a palindrome (32203466430223).

The spelling of 21002133310211 in words is "twenty-one trillion, two billion, one hundred thirty-three million, three hundred ten thousand, two hundred eleven".