21020302211 has 8 divisors (see below), whose sum is σ = 21137054400. Its totient is φ = 20903794560.

The previous prime is 21020302207. The next prime is 21020302213. The reversal of 21020302211 is 11220302012.

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 21020302211 - 2² = 21020302207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21020302213) 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, 112625 + ... + 233933.

It is an arithmetic number, because the mean of its divisors is an integer number (2642131800).

Almost surely, 2^21020302211 is an apocalyptic number.

21020302211 is a deficient number, since it is larger than the sum of its proper divisors (116752189).

21020302211 is a wasteful number, since it uses less digits than its factorization.

21020302211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122269.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21020302211 its reverse (11220302012), we get a palindrome (32240604223).

The spelling of 21020302211 in words is "twenty-one billion, twenty million, three hundred two thousand, two hundred eleven".