2111222120220 has 240 divisors, whose sum is σ = 6725278929600. Its totient is φ = 554318069760.

The previous prime is 2111222120201. The next prime is 2111222120237. The reversal of 2111222120220 is 220212221112.

It is a happy number.

2111222120220 is a `hidden beast` number, since 211 + 1 + 22 + 212 + 0 + 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 = 2111222120193 and 2111222120202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 88438446 + ... + 88462314.

It is an arithmetic number, because the mean of its divisors is an integer number (28021995540).

Almost surely, 2^{2111222120220} is an apocalyptic number.

2111222120220 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 2111222120220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3362639464800).

2111222120220 is an abundant number, since it is smaller than the sum of its proper divisors (4614056809380).

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

2111222120220 is a wasteful number, since it uses less digits than its factorization.

2111222120220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24730 (or 24719 counting only the distinct ones).

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

Adding to 2111222120220 its reverse (220212221112), we get a palindrome (2331434341332).

The spelling of 2111222120220 in words is "two trillion, one hundred eleven billion, two hundred twenty-two million, one hundred twenty thousand, two hundred twenty".