221000001101220 has 96 divisors (see below), whose sum is σ = 675072986265216. Its totient is φ = 53574294553600.

The previous prime is 221000001101119. The next prime is 221000001101261. The reversal of 221000001101220 is 22101100000122.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 221000001101196 and 221000001101205.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19707862 + ... + 28816658.

It is an arithmetic number, because the mean of its divisors is an integer number (7032010273596).

Almost surely, 2^{221000001101220} is an apocalyptic number.

221000001101220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221000001101220 is an abundant number, since it is smaller than the sum of its proper divisors (454072985163996).

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

221000001101220 is a wasteful number, since it uses less digits than its factorization.

221000001101220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9145581 (or 9145579 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 221000001101220 its reverse (22101100000122), we get a palindrome (243101101101342).

The spelling of 221000001101220 in words is "two hundred twenty-one trillion, one million, one hundred one thousand, two hundred twenty".