21212210020011 has 8 divisors (see below), whose sum is σ = 28282997944320. Its totient is φ = 14141447721192.

The previous prime is 21212210019991. The next prime is 21212210020019. The reversal of 21212210020011 is 11002001221212.

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

It is not a de Polignac number, because 21212210020011 - 2²¹ = 21212207922859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21212210020019) 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, 4383655 + ... + 7851168.

It is an arithmetic number, because the mean of its divisors is an integer number (3535374743040).

Almost surely, 2^{21212210020011} is an apocalyptic number.

21212210020011 is a deficient number, since it is larger than the sum of its proper divisors (7070787924309).

21212210020011 is a wasteful number, since it uses less digits than its factorization.

21212210020011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12812745.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21212210020011 its reverse (11002001221212), we get a palindrome (32214211241223).

The spelling of 21212210020011 in words is "twenty-one trillion, two hundred twelve billion, two hundred ten million, twenty thousand, eleven".