21222201202011 has 12 divisors (see below), whose sum is σ = 30998720858040. Its totient is φ = 13989166334880.

The previous prime is 21222201201961. The next prime is 21222201202043. The reversal of 21222201202011 is 11020210222212.

It is a happy number.

21222201202011 is a `hidden beast` number, since 2 + 122 + 220 + 120 + 201 + 1 = 666.

It is not a de Polignac number, because 21222201202011 - 2⁶ = 21222201201947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21222201202051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13247315805 + ... + 13247317406.

It is an arithmetic number, because the mean of its divisors is an integer number (2583226738170).

Almost surely, 2^{21222201202011} is an apocalyptic number.

21222201202011 is a deficient number, since it is larger than the sum of its proper divisors (9776519656029).

21222201202011 is a wasteful number, since it uses less digits than its factorization.

21222201202011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26494633306 (or 26494633303 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21222201202011 its reverse (11020210222212), we get a palindrome (32242411424223).

The spelling of 21222201202011 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred one million, two hundred two thousand, eleven".