2103131220 has 48 divisors (see below), whose sum is σ = 5891054400. Its totient is φ = 560617216.

The previous prime is 2103131167. The next prime is 2103131237. The reversal of 2103131220 is 221313012.

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 2103131220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201859 + ... + 212021.

It is an arithmetic number, because the mean of its divisors is an integer number (122730300).

Almost surely, 2^2103131220 is an apocalyptic number.

2103131220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2103131220 is an abundant number, since it is smaller than the sum of its proper divisors (3787923180).

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

2103131220 is a wasteful number, since it uses less digits than its factorization.

2103131220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13624 (or 13622 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 2103131220 is about 45859.9086348850. The cubic root of 2103131220 is about 1281.2153211474.

Adding to 2103131220 its reverse (221313012), we get a palindrome (2324444232).

The spelling of 2103131220 in words is "two billion, one hundred three million, one hundred thirty-one thousand, two hundred twenty".