221003112220 has 24 divisors (see below), whose sum is σ = 506298039408. Its totient is φ = 80364768000.

The previous prime is 221003112191. The next prime is 221003112221. The reversal of 221003112220 is 22211300122.

It is a happy number.

It is a super-2 number, since 2×221003112220² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221003112194 and 221003112203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221003112221) 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, 502279581 + ... + 502280020.

It is an arithmetic number, because the mean of its divisors is an integer number (21095751642).

Almost surely, 2^221003112220 is an apocalyptic number.

221003112220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221003112220 is an abundant number, since it is smaller than the sum of its proper divisors (285294927188).

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

221003112220 is a wasteful number, since it uses less digits than its factorization.

221003112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1004559621 (or 1004559619 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 221003112220 its reverse (22211300122), we get a palindrome (243214412342).

The spelling of 221003112220 in words is "two hundred twenty-one billion, three million, one hundred twelve thousand, two hundred twenty".