2102221242 has 64 divisors (see below), whose sum is σ = 5124712320. Its totient is φ = 633484800.

The previous prime is 2102221213. The next prime is 2102221243. The reversal of 2102221242 is 2421222012.

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

It is not an unprimeable number, because it can be changed into a prime (2102221243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97738 + ... + 117290.

It is an arithmetic number, because the mean of its divisors is an integer number (80073630).

Almost surely, 2^2102221242 is an apocalyptic number.

2102221242 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 2102221242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2562356160).

2102221242 is an abundant number, since it is smaller than the sum of its proper divisors (3022491078).

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

2102221242 is a wasteful number, since it uses less digits than its factorization.

2102221242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19756 (or 19750 counting only the distinct ones).

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

The square root of 2102221242 is about 45849.9862813502. The cubic root of 2102221242 is about 1281.0305100533.

Adding to 2102221242 its reverse (2421222012), we get a palindrome (4523443254).

The spelling of 2102221242 in words is "two billion, one hundred two million, two hundred twenty-one thousand, two hundred forty-two".