21120221120222 has 16 divisors (see below), whose sum is σ = 36206187486432. Its totient is φ = 9051499802880.

The previous prime is 21120221120189. The next prime is 21120221120227. The reversal of 21120221120222 is 22202112202112.

It is a junction number, because it is equal to n+sod(n) for n = 21120221120194 and 21120221120203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120221120227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4306298 + ... + 7796450.

It is an arithmetic number, because the mean of its divisors is an integer number (2262886717902).

Almost surely, 2^{21120221120222} is an apocalyptic number.

21120221120222 is a deficient number, since it is larger than the sum of its proper divisors (15085966366210).

21120221120222 is a wasteful number, since it uses less digits than its factorization.

21120221120222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3922403.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21120221120222 its reverse (22202112202112), we get a palindrome (43322333322334).

The spelling of 21120221120222 in words is "twenty-one trillion, one hundred twenty billion, two hundred twenty-one million, one hundred twenty thousand, two hundred twenty-two".