2102001222222 has 96 divisors (see below), whose sum is σ = 5114355966720. Its totient is φ = 618430901760.

The previous prime is 2102001222203. The next prime is 2102001222283. The reversal of 2102001222222 is 2222221002012.

2102001222222 is a `hidden beast` number, since 21 + 0 + 200 + 1 + 222 + 222 = 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 = 2102001222195 and 2102001222204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 682654 + ... + 2161022.

It is an arithmetic number, because the mean of its divisors is an integer number (53274541320).

Almost surely, 2^{2102001222222} is an apocalyptic number.

2102001222222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 2102001222222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2557177983360).

2102001222222 is an abundant number, since it is smaller than the sum of its proper divisors (3012354744498).

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

2102001222222 is a wasteful number, since it uses less digits than its factorization.

2102001222222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1478598 (or 1478595 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 2102001222222 its reverse (2222221002012), we get a palindrome (4324222224234).

The spelling of 2102001222222 in words is "two trillion, one hundred two billion, one million, two hundred twenty-two thousand, two hundred twenty-two".