2123223220 has 12 divisors (see below), whose sum is σ = 4458768804. Its totient is φ = 849289280.

The previous prime is 2123223199. The next prime is 2123223257. The reversal of 2123223220 is 223223212.

It can be written as a sum of positive squares in 2 ways, for example, as 220344336 + 1902878884 = 14844^2 + 43622^2 .

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 53080561 + ... + 53080600.

It is an arithmetic number, because the mean of its divisors is an integer number (371564067).

Almost surely, 2^2123223220 is an apocalyptic number.

2123223220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2123223220 is an abundant number, since it is smaller than the sum of its proper divisors (2335545584).

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

2123223220 is a wasteful number, since it uses less digits than its factorization.

2123223220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106161170 (or 106161168 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 2123223220 is about 46078.4463713785. The cubic root of 2123223220 is about 1285.2823737123.

Adding to 2123223220 its reverse (223223212), we get a palindrome (2346446432).

The spelling of 2123223220 in words is "two billion, one hundred twenty-three million, two hundred twenty-three thousand, two hundred twenty".