221010111222220 has 12 divisors (see below), whose sum is σ = 464121233566704. Its totient is φ = 88404044488880.

The previous prime is 221010111222181. The next prime is 221010111222223. The reversal of 221010111222220 is 22222111010122.

It is not an unprimeable number, because it can be changed into a prime (221010111222223) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5525252780536 + ... + 5525252780575.

It is an arithmetic number, because the mean of its divisors is an integer number (38676769463892).

Almost surely, 2^{221010111222220} is an apocalyptic number.

221010111222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221010111222220 is an abundant number, since it is smaller than the sum of its proper divisors (243111122344484).

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

221010111222220 is a wasteful number, since it uses less digits than its factorization.

221010111222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11050505561120 (or 11050505561118 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221010111222220 its reverse (22222111010122), we get a palindrome (243232222232342).

The spelling of 221010111222220 in words is "two hundred twenty-one trillion, ten billion, one hundred eleven million, two hundred twenty-two thousand, two hundred twenty".