21120211220222 has 8 divisors (see below), whose sum is σ = 31683606953400. Its totient is φ = 10559008902424.

The previous prime is 21120211220209. The next prime is 21120211220231. The reversal of 21120211220222 is 22202211202112.

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

It is a junction number, because it is equal to n+sod(n) for n = 21120211220194 and 21120211220203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 548329772 + ... + 548368287.

It is an arithmetic number, because the mean of its divisors is an integer number (3960450869175).

Almost surely, 2^{21120211220222} is an apocalyptic number.

21120211220222 is a deficient number, since it is larger than the sum of its proper divisors (10563395733178).

21120211220222 is a wasteful number, since it uses less digits than its factorization.

21120211220222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1096707690.

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

Adding to 21120211220222 its reverse (22202211202112), we get a palindrome (43322422422334).

The spelling of 21120211220222 in words is "twenty-one trillion, one hundred twenty billion, two hundred eleven million, two hundred twenty thousand, two hundred twenty-two".