21110120212222 has 8 divisors (see below), whose sum is σ = 33331768756200. Its totient is φ = 9999530626824.

The previous prime is 21110120212217. The next prime is 21110120212231. The reversal of 21110120212222 is 22221202101112.

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

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 21110120212222.

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, 277764739597 + ... + 277764739672.

It is an arithmetic number, because the mean of its divisors is an integer number (4166471094525).

Almost surely, 2^{21110120212222} is an apocalyptic number.

21110120212222 is a deficient number, since it is larger than the sum of its proper divisors (12221648543978).

21110120212222 is a wasteful number, since it uses less digits than its factorization.

21110120212222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555529479290.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21110120212222 its reverse (22221202101112), we get a palindrome (43331322313334).

The spelling of 21110120212222 in words is "twenty-one trillion, one hundred ten billion, one hundred twenty million, two hundred twelve thousand, two hundred twenty-two".