21002202211 has 8 divisors (see below), whose sum is σ = 21364439040. Its totient is φ = 20640174408.

The previous prime is 21002202163. The next prime is 21002202227. The reversal of 21002202211 is 11220220012.

It is a happy number.

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 21002202211 - 2³¹ = 18854718563 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21002202191 and 21002202200.

It is not an unprimeable number, because it can be changed into a prime (21002202241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157630 + ... + 258556.

It is an arithmetic number, because the mean of its divisors is an integer number (2670554880).

Almost surely, 2^21002202211 is an apocalyptic number.

21002202211 is a deficient number, since it is larger than the sum of its proper divisors (362236829).

21002202211 is a wasteful number, since it uses less digits than its factorization.

21002202211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104513.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21002202211 its reverse (11220220012), we get a palindrome (32222422223).

The spelling of 21002202211 in words is "twenty-one billion, two million, two hundred two thousand, two hundred eleven".