21220222210110 has 768 divisors, whose sum is σ = 73562675281920. Its totient is φ = 4302020056320.

The previous prime is 21220222210081. The next prime is 21220222210133. The reversal of 21220222210110 is 1101222202212.

It is a happy number.

21220222210110 is a `hidden beast` number, since 2 + 1 + 220 + 222 + 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 383 ways as a sum of consecutive naturals, for example, 8904833979 + ... + 8904836361.

It is an arithmetic number, because the mean of its divisors is an integer number (95784733440).

Almost surely, 2^{21220222210110} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21220222210110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36781337640960).

21220222210110 is an abundant number, since it is smaller than the sum of its proper divisors (52342453071810).

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

21220222210110 is a wasteful number, since it uses less digits than its factorization.

21220222210110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3890 (or 3877 counting only the distinct ones).

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

Adding to 21220222210110 its reverse (1101222202212), we get a palindrome (22321444412322).

The spelling of 21220222210110 in words is "twenty-one trillion, two hundred twenty billion, two hundred twenty-two million, two hundred ten thousand, one hundred ten".