221012202220 has 48 divisors (see below), whose sum is σ = 465079200768. Its totient is φ = 88223410880.

The previous prime is 221012202217. The next prime is 221012202233. The reversal of 221012202220 is 22202210122.

It is a junction number, because it is equal to n+sod(n) for n = 221012202194 and 221012202203.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30143955 + ... + 30151285.

It is an arithmetic number, because the mean of its divisors is an integer number (9689150016).

Almost surely, 2^221012202220 is an apocalyptic number.

221012202220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221012202220 is an abundant number, since it is smaller than the sum of its proper divisors (244066998548).

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

221012202220 is a wasteful number, since it uses less digits than its factorization.

221012202220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10230 (or 10228 counting only the distinct ones).

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

Adding to 221012202220 its reverse (22202210122), we get a palindrome (243214412342).

The spelling of 221012202220 in words is "two hundred twenty-one billion, twelve million, two hundred two thousand, two hundred twenty".