21002211220211 has 8 divisors (see below), whose sum is σ = 22659114686544. Its totient is φ = 19351214719200.

The previous prime is 21002211220171. The next prime is 21002211220217. The reversal of 21002211220211 is 11202211220012.

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

It is a de Polignac number, because none of the positive numbers 2^k-21002211220211 is a prime.

It is a super-2 number, since 2×21002211220211² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21002211220211.

It is not an unprimeable number, because it can be changed into a prime (21002211220217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1476733940 + ... + 1476748161.

It is an arithmetic number, because the mean of its divisors is an integer number (2832389335818).

Almost surely, 2^{21002211220211} is an apocalyptic number.

21002211220211 is a deficient number, since it is larger than the sum of its proper divisors (1656903466333).

21002211220211 is a wasteful number, since it uses less digits than its factorization.

21002211220211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2953482661.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21002211220211 its reverse (11202211220012), we get a palindrome (32204422440223).

The spelling of 21002211220211 in words is "twenty-one trillion, two billion, two hundred eleven million, two hundred twenty thousand, two hundred eleven".