21100220102222 has 8 divisors (see below), whose sum is σ = 32671308545472. Its totient is φ = 10209783920400.

The previous prime is 21100220102179. The next prime is 21100220102231. The reversal of 21100220102222 is 22220102200112.

It is a happy number.

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 21100220102222.

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, 170163065279 + ... + 170163065402.

It is an arithmetic number, because the mean of its divisors is an integer number (4083913568184).

Almost surely, 2^{21100220102222} is an apocalyptic number.

21100220102222 is a deficient number, since it is larger than the sum of its proper divisors (11571088443250).

21100220102222 is a wasteful number, since it uses less digits than its factorization.

21100220102222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340326130714.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21100220102222 its reverse (22220102200112), we get a palindrome (43320322302334).

The spelling of 21100220102222 in words is "twenty-one trillion, one hundred billion, two hundred twenty million, one hundred two thousand, two hundred twenty-two".