221101110210220 has 24 divisors (see below), whose sum is σ = 488749822570800. Its totient is φ = 83785683868992.

The previous prime is 221101110210173. The next prime is 221101110210241. The reversal of 221101110210220 is 22012011101122.

It is a junction number, because it is equal to n+sod(n) for n = 221101110210194 and 221101110210203.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 290922513055 + ... + 290922513814.

It is an arithmetic number, because the mean of its divisors is an integer number (20364575940450).

Almost surely, 2^{221101110210220} is an apocalyptic number.

221101110210220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221101110210220 is an abundant number, since it is smaller than the sum of its proper divisors (267648712360580).

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

221101110210220 is a wasteful number, since it uses less digits than its factorization.

221101110210220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581845026897 (or 581845026895 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221101110210220 its reverse (22012011101122), we get a palindrome (243113121311342).

The spelling of 221101110210220 in words is "two hundred twenty-one trillion, one hundred one billion, one hundred ten million, two hundred ten thousand, two hundred twenty".