21200221011222 has 64 divisors (see below), whose sum is σ = 51395022443520. Its totient is φ = 6424240989600.

The previous prime is 21200221011217. The next prime is 21200221011223. The reversal of 21200221011222 is 22211012200212.

It is a happy number.

21200221011222 is a `hidden beast` number, since 21 + 200 + 2 + 210 + 11 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21200221011195 and 21200221011204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200221011223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 100627072 + ... + 100837532.

It is an arithmetic number, because the mean of its divisors is an integer number (803047225680).

Almost surely, 2^{21200221011222} is an apocalyptic number.

21200221011222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21200221011222 is an abundant number, since it is smaller than the sum of its proper divisors (30194801432298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21200221011222 is a wasteful number, since it uses less digits than its factorization.

21200221011222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380066 (or 380060 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21200221011222 its reverse (22211012200212), we get a palindrome (43411233211434).

The spelling of 21200221011222 in words is "twenty-one trillion, two hundred billion, two hundred twenty-one million, eleven thousand, two hundred twenty-two".