21022112222011 has 16 divisors (see below), whose sum is σ = 21253230592000. Its totient is φ = 20792060825760.

The previous prime is 21022112221997. The next prime is 21022112222017. The reversal of 21022112222011 is 11022221122012.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21022112222011 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 21022112222011.

It is not an unprimeable number, because it can be changed into a prime (21022112222017) 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, 128046106 + ... + 128210176.

It is an arithmetic number, because the mean of its divisors is an integer number (1328326912000).

Almost surely, 2^{21022112222011} is an apocalyptic number.

21022112222011 is a deficient number, since it is larger than the sum of its proper divisors (231118369989).

21022112222011 is a wasteful number, since it uses less digits than its factorization.

21022112222011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167314.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21022112222011 its reverse (11022221122012), we get a palindrome (32044333344023).

The spelling of 21022112222011 in words is "twenty-one trillion, twenty-two billion, one hundred twelve million, two hundred twenty-two thousand, eleven".