21222112219 has 48 divisors (see below), whose sum is σ = 27761294592. Its totient is φ = 16034760000.

The previous prime is 21222112189. The next prime is 21222112229. The reversal of 21222112219 is 91221122212.

It is a happy number.

It is not a de Polignac number, because 21222112219 - 2¹⁹ = 21221587931 is a prime.

It is a super-2 number, since 2×21222112219² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21222112193 and 21222112202.

It is not an unprimeable number, because it can be changed into a prime (21222112229) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2329864 + ... + 2338954.

It is an arithmetic number, because the mean of its divisors is an integer number (578360304).

Almost surely, 2^21222112219 is an apocalyptic number.

21222112219 is a deficient number, since it is larger than the sum of its proper divisors (6539182373).

21222112219 is a wasteful number, since it uses less digits than its factorization.

21222112219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9248 (or 9241 counting only the distinct ones).

The product of its digits is 576, while the sum is 25.

It can be divided in two parts, 2 and 1222112219, that added together give a palindrome (1222112221).

The spelling of 21222112219 in words is "twenty-one billion, two hundred twenty-two million, one hundred twelve thousand, two hundred nineteen".