21222220202011 has 16 divisors (see below), whose sum is σ = 21391845634080. Its totient is φ = 21052813730560.

The previous prime is 21222220201991. The next prime is 21222220202017. The reversal of 21222220202011 is 11020202222212.

It is a cyclic number.

It is not a de Polignac number, because 21222220202011 - 2³⁵ = 21187860463643 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21222220202011.

It is not an unprimeable number, because it can be changed into a prime (21222220202017) 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, 1529302005 + ... + 1529315881.

It is an arithmetic number, because the mean of its divisors is an integer number (1336990352130).

Almost surely, 2^{21222220202011} is an apocalyptic number.

21222220202011 is a deficient number, since it is larger than the sum of its proper divisors (169625432069).

21222220202011 is a wasteful number, since it uses less digits than its factorization.

21222220202011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20894.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21222220202011 its reverse (11020202222212), we get a palindrome (32242422424223).

The spelling of 21222220202011 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred twenty million, two hundred two thousand, eleven".