21200022120222 has 36 divisors (see below), whose sum is σ = 50488757919600. Its totient is φ = 6424249126680.

The previous prime is 21200022120143. The next prime is 21200022120241. The reversal of 21200022120222 is 22202122000212.

21200022120222 is a `hidden beast` number, since 2 + 1 + 200 + 0 + 221 + 20 + 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 = 21200022120195 and 21200022120204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4866853222 + ... + 4866857577.

Almost surely, 2^{21200022120222} is an apocalyptic number.

21200022120222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21200022120222 is an abundant number, since it is smaller than the sum of its proper divisors (29288735799378).

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

21200022120222 is a wasteful number, since it uses less digits than its factorization.

21200022120222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9733710829 (or 9733710815 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 21200022120222 its reverse (22202122000212), we get a palindrome (43402144120434).

The spelling of 21200022120222 in words is "twenty-one trillion, two hundred billion, twenty-two million, one hundred twenty thousand, two hundred twenty-two".