21130020211 has 8 divisors (see below), whose sum is σ = 21169481904. Its totient is φ = 21090588960.

The previous prime is 21130020187. The next prime is 21130020257. The reversal of 21130020211 is 11202003112.

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 21130020211 - 2⁷ = 21130020083 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21130020191 and 21130020200.

It is not an unprimeable number, because it can be changed into a prime (21130024211) 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 7 ways as a sum of consecutive naturals, for example, 1739220 + ... + 1751326.

It is an arithmetic number, because the mean of its divisors is an integer number (2646185238).

Almost surely, 2^21130020211 is an apocalyptic number.

21130020211 is a deficient number, since it is larger than the sum of its proper divisors (39461693).

21130020211 is a wasteful number, since it uses less digits than its factorization.

21130020211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15221.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21130020211 its reverse (11202003112), we get a palindrome (32332023323).

The spelling of 21130020211 in words is "twenty-one billion, one hundred thirty million, twenty thousand, two hundred eleven".