2112222120210 has 48 divisors (see below), whose sum is σ = 5640203940696. Its totient is φ = 548036008704.

The previous prime is 2112222120181. The next prime is 2112222120227. The reversal of 2112222120210 is 120212222112.

It is a happy number.

2112222120210 is a `hidden beast` number, since 2 + 112 + 222 + 120 + 210 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2067323476761 + 44898643449 = 1437819^2 + 211893^2 .

It is a super-2 number, since 2×2112222120210² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 317147139 + ... + 317153798.

Almost surely, 2^{2112222120210} is an apocalyptic number.

2112222120210 is an abundant number, since it is smaller than the sum of its proper divisors (3527981820486).

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

2112222120210 is a wasteful number, since it uses less digits than its factorization.

2112222120210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634300987 (or 634300984 counting only the distinct ones).

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

Adding to 2112222120210 its reverse (120212222112), we get a palindrome (2232434342322).

The spelling of 2112222120210 in words is "two trillion, one hundred twelve billion, two hundred twenty-two million, one hundred twenty thousand, two hundred ten".