221020222120 has 32 divisors (see below), whose sum is σ = 497329365600. Its totient is φ = 88402068288.

The previous prime is 221020222117. The next prime is 221020222121. The reversal of 221020222120 is 21222020122.

It is a junction number, because it is equal to n+sod(n) for n = 221020222094 and 221020222103.

It is not an unprimeable number, because it can be changed into a prime (221020222121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 431791 + ... + 792769.

It is an arithmetic number, because the mean of its divisors is an integer number (15541542675).

Almost surely, 2^221020222120 is an apocalyptic number.

221020222120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221020222120 is an abundant number, since it is smaller than the sum of its proper divisors (276309143480).

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

221020222120 is a wasteful number, since it uses less digits than its factorization.

221020222120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376297 (or 376293 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 221020222120 its reverse (21222020122), we get a palindrome (242242242242).

It can be divided in two parts, 2210202 and 22120, that added together give a palindrome (2232322).

The spelling of 221020222120 in words is "two hundred twenty-one billion, twenty million, two hundred twenty-two thousand, one hundred twenty".