2112213323220 has 384 divisors, whose sum is σ = 8214565847040. Its totient is φ = 391169157120.

The previous prime is 2112213323189. The next prime is 2112213323237. The reversal of 2112213323220 is 223233122112.

It is a super-2 number, since 2×2112213323220² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1135389 + ... + 2348091.

It is an arithmetic number, because the mean of its divisors is an integer number (21392098560).

Almost surely, 2^{2112213323220} is an apocalyptic number.

2112213323220 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 2112213323220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4107282923520).

2112213323220 is an abundant number, since it is smaller than the sum of its proper divisors (6102352523820).

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

2112213323220 is a wasteful number, since it uses less digits than its factorization.

2112213323220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212775 (or 1212773 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 2112213323220 its reverse (223233122112), we get a palindrome (2335446445332).

The spelling of 2112213323220 in words is "two trillion, one hundred twelve billion, two hundred thirteen million, three hundred twenty-three thousand, two hundred twenty".