2123102220 has 24 divisors (see below), whose sum is σ = 5944686384. Its totient is φ = 566160576.

The previous prime is 2123102213. The next prime is 2123102243. The reversal of 2123102220 is 222013212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2123102220.

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 7 ways as a sum of consecutive naturals, for example, 17692459 + ... + 17692578.

It is an arithmetic number, because the mean of its divisors is an integer number (247695266).

Almost surely, 2^2123102220 is an apocalyptic number.

2123102220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2123102220 is an abundant number, since it is smaller than the sum of its proper divisors (3821584164).

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

2123102220 is a wasteful number, since it uses less digits than its factorization.

2123102220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35385049 (or 35385047 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 2123102220 is about 46077.1333743756. The cubic root of 2123102220 is about 1285.2579576704.

Adding to 2123102220 its reverse (222013212), we get a palindrome (2345115432).

The spelling of 2123102220 in words is "two billion, one hundred twenty-three million, one hundred two thousand, two hundred twenty".