2221200111220 has 48 divisors (see below), whose sum is σ = 4776023165760. Its totient is φ = 867267588096.

The previous prime is 2221200111203. The next prime is 2221200111227. The reversal of 2221200111220 is 221110021222.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2221200111194 and 2221200111203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221200111227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 540084 + ... + 2175796.

It is an arithmetic number, because the mean of its divisors is an integer number (99500482620).

Almost surely, 2^{2221200111220} is an apocalyptic number.

2221200111220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2221200111220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2388011582880).

2221200111220 is an abundant number, since it is smaller than the sum of its proper divisors (2554823054540).

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

2221200111220 is a wasteful number, since it uses less digits than its factorization.

2221200111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1637344 (or 1637342 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2221200111220 its reverse (221110021222), we get a palindrome (2442310132442).

The spelling of 2221200111220 in words is "two trillion, two hundred twenty-one billion, two hundred million, one hundred eleven thousand, two hundred twenty".