2103213220 has 24 divisors (see below), whose sum is σ = 4477254264. Its totient is φ = 829760256.

The previous prime is 2103213209. The next prime is 2103213223. The reversal of 2103213220 is 223123012.

It can be written as a sum of positive squares in 4 ways, for example, as 610781796 + 1492431424 = 24714^2 + 38632^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2103213194 and 2103213203.

It is not an unprimeable number, because it can be changed into a prime (2103213223) 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, 718819 + ... + 721738.

It is an arithmetic number, because the mean of its divisors is an integer number (186552261).

Almost surely, 2^2103213220 is an apocalyptic number.

2103213220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2103213220 is an abundant number, since it is smaller than the sum of its proper divisors (2374041044).

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

2103213220 is a wasteful number, since it uses less digits than its factorization.

2103213220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1440639 (or 1440637 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 2103213220 is about 45860.8026532463. The cubic root of 2103213220 is about 1281.2319722389.

Adding to 2103213220 its reverse (223123012), we get a palindrome (2326336232).

The spelling of 2103213220 in words is "two billion, one hundred three million, two hundred thirteen thousand, two hundred twenty".