221122020101220 has 144 divisors (see below), whose sum is σ = 782200343433600. Its totient is φ = 50542176009024.

The previous prime is 221122020101123. The next prime is 221122020101237. The reversal of 221122020101220 is 22101020221122.

It is a happy number.

221122020101220 is a `hidden beast` number, since 2 + 21 + 1 + 220 + 201 + 0 + 1 + 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 = 221122020101193 and 221122020101202.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1790689962 + ... + 1790813441.

It is an arithmetic number, because the mean of its divisors is an integer number (5431946829400).

Almost surely, 2^{221122020101220} is an apocalyptic number.

221122020101220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221122020101220 is an abundant number, since it is smaller than the sum of its proper divisors (561078323332380).

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

221122020101220 is a wasteful number, since it uses less digits than its factorization.

221122020101220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3581503439 (or 3581503420 counting only the distinct ones).

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

Adding to 221122020101220 its reverse (22101020221122), we get a palindrome (243223040322342).

The spelling of 221122020101220 in words is "two hundred twenty-one trillion, one hundred twenty-two billion, twenty million, one hundred one thousand, two hundred twenty".