21012122202011 has 8 divisors (see below), whose sum is σ = 21409811559360. Its totient is φ = 20614478556672.

The previous prime is 21012122201999. The next prime is 21012122202031. The reversal of 21012122202011 is 11020222121012.

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 21012122202011 - 2⁶ = 21012122201947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21012122202031) 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, 10499270 + ... + 12339323.

It is an arithmetic number, because the mean of its divisors is an integer number (2676226444920).

Almost surely, 2^{21012122202011} is an apocalyptic number.

21012122202011 is a deficient number, since it is larger than the sum of its proper divisors (397689357349).

21012122202011 is a wasteful number, since it uses less digits than its factorization.

21012122202011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22856005.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21012122202011 its reverse (11020222121012), we get a palindrome (32032344323023).

The spelling of 21012122202011 in words is "twenty-one trillion, twelve billion, one hundred twenty-two million, two hundred two thousand, eleven".