1112222212220 has 96 divisors (see below), whose sum is σ = 2747437486080. Its totient is φ = 370333866240.

The previous prime is 1112222212217. The next prime is 1112222212223. The reversal of 1112222212220 is 222122222111.

It is an interprime number because it is at equal distance from previous prime (1112222212217) and next prime (1112222212223).

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 = 1112222212192 and 1112222212201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1112222212223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 149624 + ... + 1498943.

It is an arithmetic number, because the mean of its divisors is an integer number (28619140480).

Almost surely, 2^{1112222212220} is an apocalyptic number.

1112222212220 is a gapful number since it is divisible by the number (10) 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 1112222212220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1373718743040).

1112222212220 is an abundant number, since it is smaller than the sum of its proper divisors (1635215273860).

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

1112222212220 is a wasteful number, since it uses less digits than its factorization.

1112222212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1648723 (or 1648721 counting only the distinct ones).

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

Adding to 1112222212220 its reverse (222122222111), we get a palindrome (1334344434331).

The spelling of 1112222212220 in words is "one trillion, one hundred twelve billion, two hundred twenty-two million, two hundred twelve thousand, two hundred twenty".