2121166212 has 96 divisors (see below), whose sum is σ = 5619124224. Its totient is φ = 617136000.

The previous prime is 2121166193. The next prime is 2121166253. The reversal of 2121166212 is 2126611212.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 325587 + ... + 332037.

It is an arithmetic number, because the mean of its divisors is an integer number (58532544).

Almost surely, 2^2121166212 is an apocalyptic number.

2121166212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2121166212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2809562112).

2121166212 is an abundant number, since it is smaller than the sum of its proper divisors (3497958012).

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

2121166212 is a wasteful number, since it uses less digits than its factorization.

2121166212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6569 (or 6567 counting only the distinct ones).

The product of its digits is 576, while the sum is 24.

The square root of 2121166212 is about 46056.1202447623. The cubic root of 2121166212 is about 1284.8671731570.

Adding to 2121166212 its reverse (2126611212), we get a palindrome (4247777424).

The spelling of 2121166212 in words is "two billion, one hundred twenty-one million, one hundred sixty-six thousand, two hundred twelve".