21122220022222 has 8 divisors (see below), whose sum is σ = 34563632763672. Its totient is φ = 9601009101000.

The previous prime is 21122220022213. The next prime is 21122220022237. The reversal of 21122220022222 is 22222002222112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21122220022222² (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), and also a Moran number because the ratio is a prime number: 960100910101 = 21122220022222 / (2 + 1 + 1 + 2 + 2 + 2 + 2 + 0 + 0 + 2 + 2 + 2 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 21122220022193 and 21122220022202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 480050455029 + ... + 480050455072.

It is an arithmetic number, because the mean of its divisors is an integer number (4320454095459).

Almost surely, 2^{21122220022222} is an apocalyptic number.

21122220022222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21122220022222 is a deficient number, since it is larger than the sum of its proper divisors (13441412741450).

21122220022222 is a wasteful number, since it uses less digits than its factorization.

21122220022222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960100910114.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 21122220022222 its reverse (22222002222112), we get a palindrome (43344222244334).

The spelling of 21122220022222 in words is "twenty-one trillion, one hundred twenty-two billion, two hundred twenty million, twenty-two thousand, two hundred twenty-two".