21120210210222 has 16 divisors (see below), whose sum is σ = 46933800467280. Its totient is φ = 7040070070056.

The previous prime is 21120210210217. The next prime is 21120210210241. The reversal of 21120210210222 is 22201201202112.

It is a happy number.

21120210210222 is a `hidden beast` number, since 2 + 1 + 1 + 20 + 210 + 210 + 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 = 21120210210195 and 21120210210204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195557501893 + ... + 195557502000.

It is an arithmetic number, because the mean of its divisors is an integer number (2933362529205).

Almost surely, 2^{21120210210222} is an apocalyptic number.

21120210210222 is an abundant number, since it is smaller than the sum of its proper divisors (25813590257058).

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

21120210210222 is a wasteful number, since it uses less digits than its factorization.

21120210210222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391115003904 (or 391115003898 counting only the distinct ones).

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

Adding to 21120210210222 its reverse (22201201202112), we get a palindrome (43321411412334).

The spelling of 21120210210222 in words is "twenty-one trillion, one hundred twenty billion, two hundred ten million, two hundred ten thousand, two hundred twenty-two".