2111012222220 has 192 divisors, whose sum is σ = 7165418803200. Its totient is φ = 511705451520.

The previous prime is 2111012222213. The next prime is 2111012222233. The reversal of 2111012222220 is 222222101112.

It is a happy number.

2111012222220 is a `hidden beast` number, since 211 + 1 + 0 + 12 + 222 + 220 = 666.

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 = 2111012222193 and 2111012222202.

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 63 ways as a sum of consecutive naturals, for example, 94369477 + ... + 94391843.

It is an arithmetic number, because the mean of its divisors is an integer number (37319889600).

Almost surely, 2^{2111012222220} is an apocalyptic number.

2111012222220 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 2111012222220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3582709401600).

2111012222220 is an abundant number, since it is smaller than the sum of its proper divisors (5054406580980).

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

2111012222220 is a wasteful number, since it uses less digits than its factorization.

2111012222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38285 (or 38277 counting only the distinct ones).

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

Adding to 2111012222220 its reverse (222222101112), we get a palindrome (2333234323332).

The spelling of 2111012222220 in words is "two trillion, one hundred eleven billion, twelve million, two hundred twenty-two thousand, two hundred twenty".