21120122221222 has 16 divisors (see below), whose sum is σ = 31720801366080. Its totient is φ = 10546529006272.

The previous prime is 21120122221201. The next prime is 21120122221249. The reversal of 21120122221222 is 22212222102112.

It is a junction number, because it is equal to n+sod(n) for n = 21120122221193 and 21120122221202.

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 7 ways as a sum of consecutive naturals, for example, 4031763 + ... + 7648225.

It is an arithmetic number, because the mean of its divisors is an integer number (1982550085380).

Almost surely, 2^{21120122221222} is an apocalyptic number.

21120122221222 is a deficient number, since it is larger than the sum of its proper divisors (10600679144858).

21120122221222 is a wasteful number, since it uses less digits than its factorization.

21120122221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3620207.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 21120122221222 its reverse (22212222102112), we get a palindrome (43332344323334).

The spelling of 21120122221222 in words is "twenty-one trillion, one hundred twenty billion, one hundred twenty-two million, two hundred twenty-one thousand, two hundred twenty-two".