21000221102222 has 8 divisors (see below), whose sum is σ = 31565014060656. Its totient is φ = 10478549748672.

The previous prime is 21000221102219. The next prime is 21000221102261. The reversal of 21000221102222 is 22220112200012.

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 21000221102222.

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, 10780400003 + ... + 10780401950.

It is an arithmetic number, because the mean of its divisors is an integer number (3945626757582).

Almost surely, 2^{21000221102222} is an apocalyptic number.

21000221102222 is a deficient number, since it is larger than the sum of its proper divisors (10564792958434).

21000221102222 is a wasteful number, since it uses less digits than its factorization.

21000221102222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21560802442.

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

Adding to 21000221102222 its reverse (22220112200012), we get a palindrome (43220333302234).

The spelling of 21000221102222 in words is "twenty-one trillion, two hundred twenty-one million, one hundred two thousand, two hundred twenty-two".