2121348680 has 32 divisors (see below), whose sum is σ = 5206947840. Its totient is φ = 771399360.

The previous prime is 2121348659. The next prime is 2121348709. The reversal of 2121348680 is 868431212.

It is a self number, because there is not a number n which added to its sum of digits gives 2121348680.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2410184 + ... + 2411063.

It is an arithmetic number, because the mean of its divisors is an integer number (162717120).

Almost surely, 2^2121348680 is an apocalyptic number.

2121348680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121348680 is an abundant number, since it is smaller than the sum of its proper divisors (3085599160).

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

2121348680 is a wasteful number, since it uses less digits than its factorization.

2121348680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4821269 (or 4821265 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 2121348680 is about 46058.1011332426. The cubic root of 2121348680 is about 1284.9040145920.

Adding to 2121348680 its reverse (868431212), we get a palindrome (2989779892).

The spelling of 2121348680 in words is "two billion, one hundred twenty-one million, three hundred forty-eight thousand, six hundred eighty".