21022110220222 has 4 divisors (see below), whose sum is σ = 31533165330336. Its totient is φ = 10511055110110.

The previous prime is 21022110220217. The next prime is 21022110220231. The reversal of 21022110220222 is 22202201122012.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×21022110220222² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21022110220222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5255527555054 + ... + 5255527555057.

It is an arithmetic number, because the mean of its divisors is an integer number (7883291332584).

Almost surely, 2^{21022110220222} is an apocalyptic number.

21022110220222 is a deficient number, since it is larger than the sum of its proper divisors (10511055110114).

21022110220222 is a wasteful number, since it uses less digits than its factorization.

21022110220222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10511055110113.

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

Adding to 21022110220222 its reverse (22202201122012), we get a palindrome (43224311342234).

The spelling of 21022110220222 in words is "twenty-one trillion, twenty-two billion, one hundred ten million, two hundred twenty thousand, two hundred twenty-two".