2211220220220 has 144 divisors (see below), whose sum is σ = 7747548183648. Its totient is φ = 504520826880.

The previous prime is 2211220220171. The next prime is 2211220220281. The reversal of 2211220220220 is 220220221122.

2211220220220 is a `hidden beast` number, since 2 + 2 + 1 + 1 + 220 + 220 + 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 = 2211220220193 and 2211220220202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 32812749 + ... + 32880068.

It is an arithmetic number, because the mean of its divisors is an integer number (53802417942).

Almost surely, 2^{2211220220220} is an apocalyptic number.

2211220220220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2211220220220 is an abundant number, since it is smaller than the sum of its proper divisors (5536327963428).

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

2211220220220 is a wasteful number, since it uses less digits than its factorization.

2211220220220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65692860 (or 65692855 counting only the distinct ones).

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

Adding to 2211220220220 its reverse (220220221122), we get a palindrome (2431440441342).

The spelling of 2211220220220 in words is "two trillion, two hundred eleven billion, two hundred twenty million, two hundred twenty thousand, two hundred twenty".