12221110220 has 24 divisors (see below), whose sum is σ = 27997453008. Its totient is φ = 4444040000.

The previous prime is 12221110189. The next prime is 12221110243. The reversal of 12221110220 is 2201112221.

It is a junction number, because it is equal to n+sod(n) for n = 12221110195 and 12221110204.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27775031 + ... + 27775470.

It is an arithmetic number, because the mean of its divisors is an integer number (1166560542).

Almost surely, 2^12221110220 is an apocalyptic number.

12221110220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12221110220 is an abundant number, since it is smaller than the sum of its proper divisors (15776342788).

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

12221110220 is a wasteful number, since it uses less digits than its factorization.

12221110220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55550521 (or 55550519 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12221110220 its reverse (2201112221), we get a palindrome (14422222441).

The spelling of 12221110220 in words is "twelve billion, two hundred twenty-one million, one hundred ten thousand, two hundred twenty".