2212212011220 has 72 divisors (see below), whose sum is σ = 6776815860360. Its totient is φ = 584082374400.

The previous prime is 2212212011213. The next prime is 2212212011231. The reversal of 2212212011220 is 221102122122.

It is a happy number.

2212212011220 is a `hidden beast` number, since 2 + 21 + 221 + 201 + 1 + 220 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1049981398596 + 1162230612624 = 1024686^2 + 1078068^2 .

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 = 2212212011193 and 2212212011202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60823735 + ... + 60860094.

It is an arithmetic number, because the mean of its divisors is an integer number (94122442505).

Almost surely, 2^{2212212011220} is an apocalyptic number.

2212212011220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2212212011220 is an abundant number, since it is smaller than the sum of its proper divisors (4564603849140).

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

2212212011220 is a wasteful number, since it uses less digits than its factorization.

2212212011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121683945 (or 121683940 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2212212011220 its reverse (221102122122), we get a palindrome (2433314133342).

The spelling of 2212212011220 in words is "two trillion, two hundred twelve billion, two hundred twelve million, eleven thousand, two hundred twenty".