2123011220 has 24 divisors (see below), whose sum is σ = 4863626208. Its totient is φ = 772004000.

The previous prime is 2123011183. The next prime is 2123011229. The reversal of 2123011220 is 221103212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2123011195 and 2123011204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123011229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4824806 + ... + 4825245.

It is an arithmetic number, because the mean of its divisors is an integer number (202651092).

Almost surely, 2^2123011220 is an apocalyptic number.

2123011220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2123011220 is an abundant number, since it is smaller than the sum of its proper divisors (2740614988).

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

2123011220 is a wasteful number, since it uses less digits than its factorization.

2123011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9650071 (or 9650069 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2123011220 is about 46076.1458891692. The cubic root of 2123011220 is about 1285.2395945814.

Adding to 2123011220 its reverse (221103212), we get a palindrome (2344114432).

The spelling of 2123011220 in words is "two billion, one hundred twenty-three million, eleven thousand, two hundred twenty".