21222220210110 has 32 divisors (see below), whose sum is σ = 56592587227680. Its totient is φ = 5659258722624.

The previous prime is 21222220210069. The next prime is 21222220210253. The reversal of 21222220210110 is 1101202222212.

It is a happy number.

21222220210110 is a `hidden beast` number, since 2 + 1 + 222 + 220 + 210 + 1 + 10 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39300407527 + ... + 39300408066.

It is an arithmetic number, because the mean of its divisors is an integer number (1768518350865).

Almost surely, 2^{21222220210110} is an apocalyptic number.

21222220210110 is an abundant number, since it is smaller than the sum of its proper divisors (35370367017570).

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

21222220210110 is a wasteful number, since it uses less digits than its factorization.

21222220210110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78600815609 (or 78600815603 counting only the distinct ones).

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

Adding to 21222220210110 its reverse (1101202222212), we get a palindrome (22323422432322).

The spelling of 21222220210110 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred twenty million, two hundred ten thousand, one hundred ten".