22211221110220 has 48 divisors (see below), whose sum is σ = 49122016392960. Its totient is φ = 8412850482624.

The previous prime is 22211221110187. The next prime is 22211221110227. The reversal of 22211221110220 is 2201112211222.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (22211221110227) 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, 13210434 + ... + 14796553.

It is an arithmetic number, because the mean of its divisors is an integer number (1023375341520).

Almost surely, 2^{22211221110220} is an apocalyptic number.

22211221110220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22211221110220 is an abundant number, since it is smaller than the sum of its proper divisors (26910795282740).

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

22211221110220 is a wasteful number, since it uses less digits than its factorization.

22211221110220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28009102 (or 28009100 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 22211221110220 its reverse (2201112211222), we get a palindrome (24412333321442).

The spelling of 22211221110220 in words is "twenty-two trillion, two hundred eleven billion, two hundred twenty-one million, one hundred ten thousand, two hundred twenty".