2221222112120 has 256 divisors, whose sum is σ = 5762728903680. Its totient is φ = 762657280000.

The previous prime is 2221222112117. The next prime is 2221222112159. The reversal of 2221222112120 is 212112221222.

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 = 2221222112092 and 2221222112101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 317268620 + ... + 317275620.

It is an arithmetic number, because the mean of its divisors is an integer number (22510659780).

Almost surely, 2^{2221222112120} is an apocalyptic number.

2221222112120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2221222112120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2881364451840).

2221222112120 is an abundant number, since it is smaller than the sum of its proper divisors (3541506791560).

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

2221222112120 is a wasteful number, since it uses less digits than its factorization.

2221222112120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7446 (or 7442 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 2221222112120 its reverse (212112221222), we get a palindrome (2433334333342).

The spelling of 2221222112120 in words is "two trillion, two hundred twenty-one billion, two hundred twenty-two million, one hundred twelve thousand, one hundred twenty".