221122002220 has 24 divisors (see below), whose sum is σ = 530692805664. Its totient is φ = 75813257856.

The previous prime is 221122002151. The next prime is 221122002221. The reversal of 221122002220 is 22200221122.

It is a junction number, because it is equal to n+sod(n) for n = 221122002194 and 221122002203.

It is not an unprimeable number, because it can be changed into a prime (221122002221) 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, 789721297 + ... + 789721576.

It is an arithmetic number, because the mean of its divisors is an integer number (22112200236).

Almost surely, 2^221122002220 is an apocalyptic number.

221122002220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221122002220 is an abundant number, since it is smaller than the sum of its proper divisors (309570803444).

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

221122002220 is a wasteful number, since it uses less digits than its factorization.

221122002220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1579442889 (or 1579442887 counting only the distinct ones).

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

Adding to 221122002220 its reverse (22200221122), we get a palindrome (243322223342).

The spelling of 221122002220 in words is "two hundred twenty-one billion, one hundred twenty-two million, two thousand, two hundred twenty".