2121348186 has 24 divisors (see below), whose sum is σ = 4674159360. Its totient is φ = 695130696.

The previous prime is 2121348181. The next prime is 2121348191. The reversal of 2121348186 is 6818431212.

It is an interprime number because it is at equal distance from previous prime (2121348181) and next prime (2121348191).

It is a self number, because there is not a number n which added to its sum of digits gives 2121348186.

It is not an unprimeable number, because it can be changed into a prime (2121348181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 997690 + ... + 999813.

It is an arithmetic number, because the mean of its divisors is an integer number (194756640).

Almost surely, 2^2121348186 is an apocalyptic number.

2121348186 is an abundant number, since it is smaller than the sum of its proper divisors (2552811174).

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

2121348186 is a wasteful number, since it uses less digits than its factorization.

2121348186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1997570 (or 1997567 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 2121348186 is about 46058.0957704506. The cubic root of 2121348186 is about 1284.9039148531.

Adding to 2121348186 its reverse (6818431212), we get a palindrome (8939779398).

The spelling of 2121348186 in words is "two billion, one hundred twenty-one million, three hundred forty-eight thousand, one hundred eighty-six".