22222211220 has 96 divisors (see below), whose sum is σ = 75420858240. Its totient is φ = 5387201280.

The previous prime is 22222211203. The next prime is 22222211239. The reversal of 22222211220 is 2211222222.

22222211220 is a `hidden beast` number, since 2 + 222 + 221 + 1 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 22222211193 and 22222211202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1864617 + ... + 1876496.

It is an arithmetic number, because the mean of its divisors is an integer number (785633940).

Almost surely, 2^22222211220 is an apocalyptic number.

22222211220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22222211220 is an abundant number, since it is smaller than the sum of its proper divisors (53198647020).

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

22222211220 is a wasteful number, since it uses less digits than its factorization.

22222211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3741142 (or 3741134 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 22222211220 its reverse (2211222222), we get a palindrome (24433433442).

The spelling of 22222211220 in words is "twenty-two billion, two hundred twenty-two million, two hundred eleven thousand, two hundred twenty".