21102100222222 has 8 divisors (see below), whose sum is σ = 31676305531536. Its totient is φ = 10543331711712.

The previous prime is 21102100222199. The next prime is 21102100222249. The reversal of 21102100222222 is 22222200120112.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21102100222222.

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, 3859196283 + ... + 3859201750.

It is an arithmetic number, because the mean of its divisors is an integer number (3959538191442).

Almost surely, 2^{21102100222222} is an apocalyptic number.

21102100222222 is a deficient number, since it is larger than the sum of its proper divisors (10574205309314).

21102100222222 is a wasteful number, since it uses less digits than its factorization.

21102100222222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7718399402.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21102100222222 its reverse (22222200120112), we get a palindrome (43324300342334).

The spelling of 21102100222222 in words is "twenty-one trillion, one hundred two billion, one hundred million, two hundred twenty-two thousand, two hundred twenty-two".