21102223012222 has 64 divisors (see below), whose sum is σ = 36320546396160. Its totient is φ = 9106560777600.

The previous prime is 21102223012193. The next prime is 21102223012291. The reversal of 21102223012222 is 22221032220112.

It is a happy number.

It is a super-2 number, since 2×21102223012222² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 21102223012193 and 21102223012202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 615513093 + ... + 615547375.

It is an arithmetic number, because the mean of its divisors is an integer number (567508537440).

Almost surely, 2^{21102223012222} is an apocalyptic number.

21102223012222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21102223012222 is a deficient number, since it is larger than the sum of its proper divisors (15218323383938).

21102223012222 is a wasteful number, since it uses less digits than its factorization.

21102223012222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51409.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21102223012222 its reverse (22221032220112), we get a palindrome (43323255232334).

The spelling of 21102223012222 in words is "twenty-one trillion, one hundred two billion, two hundred twenty-three million, twelve thousand, two hundred twenty-two".