221222210110220 has 192 divisors, whose sum is σ = 518781426057216. Its totient is φ = 78550728376320.

The previous prime is 221222210110177. The next prime is 221222210110241. The reversal of 221222210110220 is 22011012222122.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 221222210110192 and 221222210110201.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9932293004 + ... + 9932315276.

It is an arithmetic number, because the mean of its divisors is an integer number (2701986594048).

Almost surely, 2^{221222210110220} is an apocalyptic number.

221222210110220 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 221222210110220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259390713028608).

221222210110220 is an abundant number, since it is smaller than the sum of its proper divisors (297559215946996).

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

221222210110220 is a wasteful number, since it uses less digits than its factorization.

221222210110220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24520 (or 24518 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221222210110220 its reverse (22011012222122), we get a palindrome (243233222332342).

The spelling of 221222210110220 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, two hundred ten million, one hundred ten thousand, two hundred twenty".