2121030500 has 48 divisors (see below), whose sum is σ = 4904840304. Its totient is φ = 798502400.

The previous prime is 2121030469. The next prime is 2121030511. The reversal of 2121030500 is 50301212.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 619312996 + 1501717504 = 24886^2 + 38752^2 .

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, 116267 + ... + 133266.

It is an arithmetic number, because the mean of its divisors is an integer number (102184173).

Almost surely, 2^2121030500 is an apocalyptic number.

2121030500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121030500 is an abundant number, since it is smaller than the sum of its proper divisors (2783809804).

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

2121030500 is a wasteful number, since it uses less digits than its factorization.

2121030500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249569 (or 249557 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 2121030500 is about 46054.6468882349. The cubic root of 2121030500 is about 1284.8397706820.

Adding to 2121030500 its reverse (50301212), we get a palindrome (2171331712).

The spelling of 2121030500 in words is "two billion, one hundred twenty-one million, thirty thousand, five hundred".