21220002120222 has 24 divisors (see below), whose sum is σ = 46030194776280. Its totient is φ = 7065099653040.

The previous prime is 21220002120217. The next prime is 21220002120227. The reversal of 21220002120222 is 22202120002212.

21220002120222 is a `hidden beast` number, since 212 + 20 + 0 + 0 + 212 + 0 + 222 = 666.

It is an interprime number because it is at equal distance from previous prime (21220002120217) and next prime (21220002120227).

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 = 21220002120195 and 21220002120204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220002120227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 686183029 + ... + 686213952.

It is an arithmetic number, because the mean of its divisors is an integer number (1917924782345).

Almost surely, 2^{21220002120222} is an apocalyptic number.

21220002120222 is an abundant number, since it is smaller than the sum of its proper divisors (24810192656058).

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

21220002120222 is a wasteful number, since it uses less digits than its factorization.

21220002120222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1372397848 (or 1372397845 counting only the distinct ones).

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

Adding to 21220002120222 its reverse (22202120002212), we get a palindrome (43422122122434).

The spelling of 21220002120222 in words is "twenty-one trillion, two hundred twenty billion, two million, one hundred twenty thousand, two hundred twenty-two".