2221220122220 has 24 divisors (see below), whose sum is σ = 5088613371408. Its totient is φ = 807716408000.

The previous prime is 2221220122171. The next prime is 2221220122243. The reversal of 2221220122220 is 222210221222.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 2221220122192 and 2221220122201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5048227331 + ... + 5048227770.

It is an arithmetic number, because the mean of its divisors is an integer number (212025557142).

Almost surely, 2^{2221220122220} is an apocalyptic number.

2221220122220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221220122220 is an abundant number, since it is smaller than the sum of its proper divisors (2867393249188).

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

2221220122220 is a wasteful number, since it uses less digits than its factorization.

2221220122220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10096455121 (or 10096455119 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 2221220122220 its reverse (222210221222), we get a palindrome (2443430343442).

The spelling of 2221220122220 in words is "two trillion, two hundred twenty-one billion, two hundred twenty million, one hundred twenty-two thousand, two hundred twenty".