221020220112 has 20 divisors (see below), whose sum is σ = 570968902080. Its totient is φ = 73673406688.

The previous prime is 221020220093. The next prime is 221020220153. The reversal of 221020220112 is 211022020122.

It is a junction number, because it is equal to n+sod(n) for n = 221020220091 and 221020220100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2302293912 + ... + 2302294007.

It is an arithmetic number, because the mean of its divisors is an integer number (28548445104).

Almost surely, 2^221020220112 is an apocalyptic number.

It is an amenable number.

221020220112 is an abundant number, since it is smaller than the sum of its proper divisors (349948681968).

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

221020220112 is a wasteful number, since it uses less digits than its factorization.

221020220112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4604587930 (or 4604587924 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 221020220112 its reverse (211022020122), we get a palindrome (432042240234).

The spelling of 221020220112 in words is "two hundred twenty-one billion, twenty million, two hundred twenty thousand, one hundred twelve".