21222201110212 has 6 divisors (see below), whose sum is σ = 37138851942878. Its totient is φ = 10611100555104.

The previous prime is 21222201110177. The next prime is 21222201110261. The reversal of 21222201110212 is 21201110222212.

It can be written as a sum of positive squares in only one way, i.e., 13569984592516 + 7652216517696 = 3683746^2 + 2766264^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21222201110212.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2652775138773 + ... + 2652775138780.

Almost surely, 2^{21222201110212} is an apocalyptic number.

It is an amenable number.

21222201110212 is a deficient number, since it is larger than the sum of its proper divisors (15916650832666).

21222201110212 is a wasteful number, since it uses less digits than its factorization.

21222201110212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5305550277557 (or 5305550277555 counting only the distinct ones).

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

Adding to 21222201110212 its reverse (21201110222212), we get a palindrome (42423311332424).

The spelling of 21222201110212 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred one million, one hundred ten thousand, two hundred twelve".