221210110022220 has 240 divisors, whose sum is σ = 757058110766496. Its totient is φ = 53624712960000.

The previous prime is 221210110022203. The next prime is 221210110022233. The reversal of 221210110022220 is 22220011012122.

It is a happy number.

221210110022220 is a `hidden beast` number, since 221 + 2 + 101 + 100 + 22 + 220 = 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 = 221210110022193 and 221210110022202.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 514801060 + ... + 515230580.

Almost surely, 2^{221210110022220} is an apocalyptic number.

221210110022220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221210110022220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (378529055383248).

221210110022220 is an abundant number, since it is smaller than the sum of its proper divisors (535848000744276).

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

221210110022220 is a wasteful number, since it uses less digits than its factorization.

221210110022220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458454 (or 458443 counting only the distinct ones).

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

Adding to 221210110022220 its reverse (22220011012122), we get a palindrome (243430121034342).

The spelling of 221210110022220 in words is "two hundred twenty-one trillion, two hundred ten billion, one hundred ten million, twenty-two thousand, two hundred twenty".