21213003020011 has 16 divisors (see below), whose sum is σ = 24163172259840. Its totient is φ = 18445549134880.

The previous prime is 21213003019913. The next prime is 21213003020017. The reversal of 21213003020011 is 11002030031212.

It is a cyclic number.

It is not a de Polignac number, because 21213003020011 - 2²³ = 21212994631403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21213003020017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 310706251 + ... + 310774516.

It is an arithmetic number, because the mean of its divisors is an integer number (1510198266240).

Almost surely, 2^{21213003020011} is an apocalyptic number.

21213003020011 is a deficient number, since it is larger than the sum of its proper divisors (2950169239829).

21213003020011 is a wasteful number, since it uses less digits than its factorization.

21213003020011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621480914.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21213003020011 its reverse (11002030031212), we get a palindrome (32215033051223).

The spelling of 21213003020011 in words is "twenty-one trillion, two hundred thirteen billion, three million, twenty thousand, eleven".